90528237 has 6 divisors (see below), whose sum is σ = 130763022. Its totient is φ = 60352152.

The previous prime is 90528211. The next prime is 90528271. The reversal of 90528237 is 73282509.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 41332041 = 7014^2 + 6429^2 .

It is not a de Polignac number, because 90528237 - 2⁶ = 90528173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90528937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5029338 + ... + 5029355.

It is an arithmetic number, because the mean of its divisors is an integer number (21793837).

Almost surely, 2^90528237 is an apocalyptic number.

It is an amenable number.

90528237 is a deficient number, since it is larger than the sum of its proper divisors (40234785).

90528237 is a wasteful number, since it uses less digits than its factorization.

90528237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10058699 (or 10058696 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 90528237 is about 9514.6327832450. The cubic root of 90528237 is about 449.0155218732.

The spelling of 90528237 in words is "ninety million, five hundred twenty-eight thousand, two hundred thirty-seven".