78255800 has 48 divisors (see below), whose sum is σ = 207940560. Its totient is φ = 26830080.

The previous prime is 78255769. The next prime is 78255847. The reversal of 78255800 is 855287.

It is a super-2 number, since 2×78255800² = 12247940467280000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26549 + ... + 29348.

It is an arithmetic number, because the mean of its divisors is an integer number (4332095).

Almost surely, 2^78255800 is an apocalyptic number.

78255800 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78255800 is an abundant number, since it is smaller than the sum of its proper divisors (129684760).

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

78255800 is a wasteful number, since it uses less digits than its factorization.

78255800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55920 (or 55911 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 78255800 is about 8846.2308357854. The cubic root of 78255800 is about 427.7324294926.

The spelling of 78255800 in words is "seventy-eight million, two hundred fifty-five thousand, eight hundred".