78522090 has 16 divisors (see below), whose sum is σ = 188453088. Its totient is φ = 20939216.

The previous prime is 78522083. The next prime is 78522107. The reversal of 78522090 is 9022587.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1308672 + ... + 1308731.

It is an arithmetic number, because the mean of its divisors is an integer number (11778318).

Almost surely, 2^78522090 is an apocalyptic number.

78522090 is an abundant number, since it is smaller than the sum of its proper divisors (109930998).

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

78522090 is a wasteful number, since it uses less digits than its factorization.

78522090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617413.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 78522090 is about 8861.2690964669. The cubic root of 78522090 is about 428.2170449792.

The spelling of 78522090 in words is "seventy-eight million, five hundred twenty-two thousand, ninety".