78207994 has 8 divisors (see below), whose sum is σ = 117868608. Its totient is φ = 38918460.

The previous prime is 78207989. The next prime is 78208001. The reversal of 78207994 is 49970287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78207994² = 12232980651008072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92242 + ... + 93085.

It is an arithmetic number, because the mean of its divisors is an integer number (14733576).

Almost surely, 2^78207994 is an apocalyptic number.

78207994 is a deficient number, since it is larger than the sum of its proper divisors (39660614).

78207994 is a wasteful number, since it uses less digits than its factorization.

78207994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185540.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 78207994 is about 8843.5283682476. The cubic root of 78207994 is about 427.6453120230.

The spelling of 78207994 in words is "seventy-eight million, two hundred seven thousand, nine hundred ninety-four".