78999004 has 12 divisors (see below), whose sum is σ = 157998064. Its totient is φ = 33856704.

The previous prime is 78998999. The next prime is 78999007. The reversal of 78999004 is 40099987.

78999004 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78999007) 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, 1410669 + ... + 1410724.

Almost surely, 2^78999004 is an apocalyptic number.

It is an amenable number.

78999004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78999004 is a wasteful number, since it uses less digits than its factorization.

78999004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821404 (or 2821402 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 78999004 is about 8888.1383877615. The cubic root of 78999004 is about 429.0822394558.

The spelling of 78999004 in words is "seventy-eight million, nine hundred ninety-nine thousand, four".