78394806 has 36 divisors (see below), whose sum is σ = 197589132. Its totient is φ = 22398264.

The previous prime is 78394759. The next prime is 78394819. The reversal of 78394806 is 60849387.

It is a happy number.

It is a super-2 number, since 2×78394806² = 12291491215555272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43560 + ... + 45323.

It is an arithmetic number, because the mean of its divisors is an integer number (5488587).

Almost surely, 2^78394806 is an apocalyptic number.

78394806 is an abundant number, since it is smaller than the sum of its proper divisors (119194326).

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

78394806 is a wasteful number, since it uses less digits than its factorization.

78394806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88905 (or 88895 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78394806 is about 8854.0841423605. The cubic root of 78394806 is about 427.9855404612.

The spelling of 78394806 in words is "seventy-eight million, three hundred ninety-four thousand, eight hundred six".