78801552 has 80 divisors (see below), whose sum is σ = 229152000. Its totient is φ = 25923456.

The previous prime is 78801533. The next prime is 78801553. The reversal of 78801552 is 25510887.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78801553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32974 + ... + 35282.

It is an arithmetic number, because the mean of its divisors is an integer number (2864400).

Almost surely, 2^78801552 is an apocalyptic number.

78801552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78801552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114576000).

78801552 is an abundant number, since it is smaller than the sum of its proper divisors (150350448).

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

78801552 is a wasteful number, since it uses less digits than its factorization.

78801552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 78801552 is about 8877.0238255848. The cubic root of 78801552 is about 428.7244550679.

The spelling of 78801552 in words is "seventy-eight million, eight hundred one thousand, five hundred fifty-two".