81480600 has 192 divisors, whose sum is σ = 285696000. Its totient is φ = 21340800.

The previous prime is 81480599. The next prime is 81480611. The reversal of 81480600 is 608418.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 426505 + ... + 426695.

It is an arithmetic number, because the mean of its divisors is an integer number (1488000).

Almost surely, 2^81480600 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 81480600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142848000).

81480600 is an abundant number, since it is smaller than the sum of its proper divisors (204215400).

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

81480600 is a wasteful number, since it uses less digits than its factorization.

81480600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 280 counting only the distinct ones).

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

The square root of 81480600 is about 9026.6605120609. The cubic root of 81480600 is about 433.5289189410.

The spelling of 81480600 in words is "eighty-one million, four hundred eighty thousand, six hundred".