90690724 has 12 divisors (see below), whose sum is σ = 167062000. Its totient is φ = 42958728.

The previous prime is 90690707. The next prime is 90690727. The reversal of 90690724 is 42709609.

It is not an unprimeable number, because it can be changed into a prime (90690727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596574 + ... + 596725.

Almost surely, 2^90690724 is an apocalyptic number.

It is an amenable number.

90690724 is a deficient number, since it is larger than the sum of its proper divisors (76371276).

90690724 is a wasteful number, since it uses less digits than its factorization.

90690724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193322 (or 1193320 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 90690724 is about 9523.1677502814. The cubic root of 90690724 is about 449.2840037675.

The spelling of 90690724 in words is "ninety million, six hundred ninety thousand, seven hundred twenty-four".