90366538 has 4 divisors (see below), whose sum is σ = 135549810. Its totient is φ = 45183268.

The previous prime is 90366533. The next prime is 90366557. The reversal of 90366538 is 83566309.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57108249 + 33258289 = 7557^2 + 5767^2 .

It is a super-2 number, since 2×90366538² = 16332222380210888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 90366538.

It is not an unprimeable number, because it can be changed into a prime (90366533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22591633 + ... + 22591636.

Almost surely, 2^90366538 is an apocalyptic number.

90366538 is a deficient number, since it is larger than the sum of its proper divisors (45183272).

90366538 is a wasteful number, since it uses less digits than its factorization.

90366538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45183271.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 90366538 is about 9506.1316001831. The cubic root of 90366538 is about 448.7480228961.

The spelling of 90366538 in words is "ninety million, three hundred sixty-six thousand, five hundred thirty-eight".