78255828 has 96 divisors (see below), whose sum is σ = 245548800. Its totient is φ = 21040128.

The previous prime is 78255769. The next prime is 78255847. The reversal of 78255828 is 82855287.

78255828 is a `hidden beast` number, since 78 + 2 + 558 + 28 = 666.

It is a super-2 number, since 2×78255828² = 12247949231931168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9808 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (2557800).

Almost surely, 2^78255828 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 78255828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122774400).

78255828 is an abundant number, since it is smaller than the sum of its proper divisors (167292972).

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

78255828 is a wasteful number, since it uses less digits than its factorization.

78255828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126 (or 6118 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 78255828 is about 8846.2324183802. The cubic root of 78255828 is about 427.7324805069.

The spelling of 78255828 in words is "seventy-eight million, two hundred fifty-five thousand, eight hundred twenty-eight".