78345916 has 48 divisors (see below), whose sum is σ = 154822752. Its totient is φ = 34380800.

The previous prime is 78345901. The next prime is 78345929. The reversal of 78345916 is 61954387.

It is a super-2 number, since 2×78345916² = 12276165107758112, 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 15 ways as a sum of consecutive naturals, for example, 246990 + ... + 247306.

It is an arithmetic number, because the mean of its divisors is an integer number (3225474).

Almost surely, 2^78345916 is an apocalyptic number.

It is an amenable number.

78345916 is a deficient number, since it is larger than the sum of its proper divisors (76476836).

78345916 is a wasteful number, since it uses less digits than its factorization.

78345916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 508 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 78345916 is about 8851.3228389885. The cubic root of 78345916 is about 427.8965525747.

The spelling of 78345916 in words is "seventy-eight million, three hundred forty-five thousand, nine hundred sixteen".