78255408 has 160 divisors (see below), whose sum is σ = 260554752. Its totient is φ = 19641600.

The previous prime is 78255391. The next prime is 78255421. The reversal of 78255408 is 80455287.

It is a super-2 number, since 2×78255408² = 12247817762492928, which contains 22 as substring.

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, 114235 + ... + 114917.

Almost surely, 2^78255408 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 78255408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130277376).

78255408 is an abundant number, since it is smaller than the sum of its proper divisors (182299344).

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

78255408 is a wasteful number, since it uses less digits than its factorization.

78255408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 78255408 is about 8846.2086794287. The cubic root of 78255408 is about 427.7317152904.

The spelling of 78255408 in words is "seventy-eight million, two hundred fifty-five thousand, four hundred eight".