78887930 has 32 divisors (see below), whose sum is σ = 161647488. Its totient is φ = 27438400.

The previous prime is 78887927. The next prime is 78887951. The reversal of 78887930 is 3978887.

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, 13061 + ... + 18120.

It is an arithmetic number, because the mean of its divisors is an integer number (5051484).

Almost surely, 2^78887930 is an apocalyptic number.

78887930 is an abundant number, since it is smaller than the sum of its proper divisors (82759558).

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

78887930 is a wasteful number, since it uses less digits than its factorization.

78887930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31222.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 78887930 is about 8881.8877497973. The cubic root of 78887930 is about 428.8810460542.

The spelling of 78887930 in words is "seventy-eight million, eight hundred eighty-seven thousand, nine hundred thirty".