90238725 has 48 divisors (see below), whose sum is σ = 169681600. Its totient is φ = 46992960.

The previous prime is 90238717. The next prime is 90238727. The reversal of 90238725 is 52783209.

It is a happy number.

It is not a de Polignac number, because 90238725 - 2³ = 90238717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90238725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90238727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27471 + ... + 30579.

Almost surely, 2^90238725 is an apocalyptic number.

It is an amenable number.

90238725 is a deficient number, since it is larger than the sum of its proper divisors (79442875).

90238725 is a wasteful number, since it uses less digits than its factorization.

90238725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171 (or 3160 counting only the distinct ones).

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

The square root of 90238725 is about 9499.4065604121. The cubic root of 90238725 is about 448.5363557066.

The spelling of 90238725 in words is "ninety million, two hundred thirty-eight thousand, seven hundred twenty-five".