90199072 has 24 divisors (see below), whose sum is σ = 177876972. Its totient is φ = 45024000.

The previous prime is 90199069. The next prime is 90199073. The reversal of 90199072 is 27099109.

It can be written as a sum of positive squares in 2 ways, for example, as 89794576 + 404496 = 9476^2 + 636^2 .

It is a super-2 number, since 2×90199072² = 16271745179322368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90199073) 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, 20422 + ... + 24442.

Almost surely, 2^90199072 is an apocalyptic number.

It is an amenable number.

90199072 is a deficient number, since it is larger than the sum of its proper divisors (87677900).

90199072 is a wasteful number, since it uses less digits than its factorization.

90199072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732 (or 4724 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 90199072 is about 9497.3192007008. The cubic root of 90199072 is about 448.4706469697.

Adding to 90199072 its sum of digits (37), we get a palindrome (90199109).

The spelling of 90199072 in words is "ninety million, one hundred ninety-nine thousand, seventy-two".