78562578 has 16 divisors (see below), whose sum is σ = 157338720. Its totient is φ = 26151936.

The previous prime is 78562573. The next prime is 78562597. The reversal of 78562578 is 87526587.

It is not an unprimeable number, because it can be changed into a prime (78562573) 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, 3900 + ... + 13127.

It is an arithmetic number, because the mean of its divisors is an integer number (9833670).

Almost surely, 2^78562578 is an apocalyptic number.

78562578 is an abundant number, since it is smaller than the sum of its proper divisors (78776142).

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

78562578 is a wasteful number, since it uses less digits than its factorization.

78562578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17801.

The product of its digits is 940800, while the sum is 48.

The square root of 78562578 is about 8863.5533506602. The cubic root of 78562578 is about 428.2906322235.

The spelling of 78562578 in words is "seventy-eight million, five hundred sixty-two thousand, five hundred seventy-eight".