78356216 has 32 divisors (see below), whose sum is σ = 153995040. Its totient is φ = 37306368.

The previous prime is 78356183. The next prime is 78356221. The reversal of 78356216 is 61265387.

It is a super-2 number, since 2×78356216² = 12279393171677312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78356216.

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, 46460 + ... + 48116.

It is an arithmetic number, because the mean of its divisors is an integer number (4812345).

Almost surely, 2^78356216 is an apocalyptic number.

It is an amenable number.

78356216 is a deficient number, since it is larger than the sum of its proper divisors (75638824).

78356216 is a wasteful number, since it uses less digits than its factorization.

78356216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1939 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 78356216 is about 8851.9046538019. The cubic root of 78356216 is about 427.9153033558.

The spelling of 78356216 in words is "seventy-eight million, three hundred fifty-six thousand, two hundred sixteen".