78785930 has 16 divisors (see below), whose sum is σ = 142637544. Its totient is φ = 31331520.

The previous prime is 78785929. The next prime is 78785947. The reversal of 78785930 is 3958787.

It can be written as a sum of positive squares in 4 ways, for example, as 61984129 + 16801801 = 7873^2 + 4099^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21041 + ... + 24500.

Almost surely, 2^78785930 is an apocalyptic number.

78785930 is a deficient number, since it is larger than the sum of its proper divisors (63851614).

78785930 is a wasteful number, since it uses less digits than its factorization.

78785930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45721.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 78785930 is about 8876.1438699471. The cubic root of 78785930 is about 428.6961223938.

The spelling of 78785930 in words is "seventy-eight million, seven hundred eighty-five thousand, nine hundred thirty".