78338556 has 24 divisors (see below), whose sum is σ = 203100240. Its totient is φ = 26112816.

The previous prime is 78338549. The next prime is 78338569. The reversal of 78338556 is 65583387.

It is a super-2 number, since 2×78338556² = 12273858712330272, 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 7 ways as a sum of consecutive naturals, for example, 362571 + ... + 362786.

It is an arithmetic number, because the mean of its divisors is an integer number (8462510).

Almost surely, 2^78338556 is an apocalyptic number.

It is an amenable number.

78338556 is an abundant number, since it is smaller than the sum of its proper divisors (124761684).

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

78338556 is a wasteful number, since it uses less digits than its factorization.

78338556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725370 (or 725362 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 78338556 is about 8850.9070721593. The cubic root of 78338556 is about 427.8831529516.

The spelling of 78338556 in words is "seventy-eight million, three hundred thirty-eight thousand, five hundred fifty-six".