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80388 = 223271129
BaseRepresentation
bin10011101000000100
311002021100
4103220010
510033023
61420100
7453240
oct235004
9132240
1080388
1155440
123a630
132a789
1421420
1518c43
hex13a04

80388 has 72 divisors (see below), whose sum is σ = 262080. Its totient is φ = 20160.

The previous prime is 80387. The next prime is 80407. The reversal of 80388 is 88308.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (80387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2758 + ... + 2786.

It is an arithmetic number, because the mean of its divisors is an integer number (3640).

280388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131040).

80388 is an abundant number, since it is smaller than the sum of its proper divisors (181692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80388 is a wasteful number, since it uses less digits than its factorization.

80388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 80388 is about 283.5277764171. The cubic root of 80388 is about 43.1582415410.

The spelling of 80388 in words is "eighty thousand, three hundred eighty-eight".

Divisors: 1 2 3 4 6 7 9 11 12 14 18 21 22 28 29 33 36 42 44 58 63 66 77 84 87 99 116 126 132 154 174 198 203 231 252 261 308 319 348 396 406 462 522 609 638 693 812 924 957 1044 1218 1276 1386 1827 1914 2233 2436 2772 2871 3654 3828 4466 5742 6699 7308 8932 11484 13398 20097 26796 40194 80388