78785570 has 16 divisors (see below), whose sum is σ = 146389248. Its totient is φ = 30497520.

The previous prime is 78785537. The next prime is 78785573. The reversal of 78785570 is 7558787.

It is not an unprimeable number, because it can be changed into a prime (78785573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126764 + ... + 127383.

It is an arithmetic number, because the mean of its divisors is an integer number (9149328).

Almost surely, 2^78785570 is an apocalyptic number.

78785570 is a deficient number, since it is larger than the sum of its proper divisors (67603678).

78785570 is a wasteful number, since it uses less digits than its factorization.

78785570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254185.

The product of its (nonzero) digits is 548800, while the sum is 47.

The square root of 78785570 is about 8876.1235908475. The cubic root of 78785570 is about 428.6954694395.

The spelling of 78785570 in words is "seventy-eight million, seven hundred eighty-five thousand, five hundred seventy".