78108556 has 12 divisors (see below), whose sum is σ = 137767168. Its totient is φ = 38746512.

The previous prime is 78108553. The next prime is 78108577. The reversal of 78108556 is 65580187.

It is a super-2 number, since 2×78108556² = 12201893040810272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78108553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76371 + ... + 77386.

Almost surely, 2^78108556 is an apocalyptic number.

It is an amenable number.

78108556 is a deficient number, since it is larger than the sum of its proper divisors (59658612).

78108556 is a wasteful number, since it uses less digits than its factorization.

78108556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153888 (or 153886 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 78108556 is about 8837.9045027653. The cubic root of 78108556 is about 427.4639911305.

The spelling of 78108556 in words is "seventy-eight million, one hundred eight thousand, five hundred fifty-six".