90732160 has 32 divisors (see below), whose sum is σ = 216908100. Its totient is φ = 36292608.

The previous prime is 90732101. The next prime is 90732199. The reversal of 90732160 is 6123709.

It can be written as a sum of positive squares in 2 ways, for example, as 90478144 + 254016 = 9512^2 + 504^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70245 + ... + 71524.

Almost surely, 2^90732160 is an apocalyptic number.

It is an amenable number.

90732160 is an abundant number, since it is smaller than the sum of its proper divisors (126175940).

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

90732160 is a wasteful number, since it uses less digits than its factorization.

90732160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141788 (or 141776 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 90732160 is about 9525.3430384422. The cubic root of 90732160 is about 449.3524183257.

Adding to 90732160 its reverse (6123709), we get a palindrome (96855869).

The spelling of 90732160 in words is "ninety million, seven hundred thirty-two thousand, one hundred sixty".