78255504 has 80 divisors (see below), whose sum is σ = 227564800. Its totient is φ = 25743744.

The previous prime is 78255503. The next prime is 78255533. The reversal of 78255504 is 40555287.

It is a happy number.

It is a super-2 number, since 2×78255504² = 12247847812588032, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (78255503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32982 + ... + 35274.

It is an arithmetic number, because the mean of its divisors is an integer number (2844560).

Almost surely, 2^78255504 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 78255504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113782400).

78255504 is an abundant number, since it is smaller than the sum of its proper divisors (149309296).

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

78255504 is a wasteful number, since it uses less digits than its factorization.

78255504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 78255504 is about 8846.2141054804. The cubic root of 78255504 is about 427.7318901972.

The spelling of 78255504 in words is "seventy-eight million, two hundred fifty-five thousand, five hundred four".