90124520 has 16 divisors (see below), whose sum is σ = 202780260. Its totient is φ = 36049792.

The previous prime is 90124499. The next prime is 90124537. The reversal of 90124520 is 2542109.

It can be written as a sum of positive squares in 2 ways, for example, as 87647044 + 2477476 = 9362^2 + 1574^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126517 + ... + 1126596.

Almost surely, 2^90124520 is an apocalyptic number.

It is an amenable number.

90124520 is an abundant number, since it is smaller than the sum of its proper divisors (112655740).

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

90124520 is a wasteful number, since it uses less digits than its factorization.

90124520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253124 (or 2253120 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 90124520 is about 9493.3934923188. The cubic root of 90124520 is about 448.3470551609.

Adding to 90124520 its reverse (2542109), we get a palindrome (92666629).

The spelling of 90124520 in words is "ninety million, one hundred twenty-four thousand, five hundred twenty".