90790688 has 12 divisors (see below), whose sum is σ = 178744230. Its totient is φ = 45395328.

The previous prime is 90790669. The next prime is 90790697. The reversal of 90790688 is 88609709.

It can be written as a sum of positive squares in only one way, i.e., 75829264 + 14961424 = 8708^2 + 3868^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1418573 + ... + 1418636.

Almost surely, 2^90790688 is an apocalyptic number.

It is an amenable number.

90790688 is a deficient number, since it is larger than the sum of its proper divisors (87953542).

90790688 is a wasteful number, since it uses less digits than its factorization.

90790688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837219 (or 2837211 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 90790688 is about 9528.4147684701. The cubic root of 90790688 is about 449.4490178312.

The spelling of 90790688 in words is "ninety million, seven hundred ninety thousand, six hundred eighty-eight".