90319538 has 8 divisors (see below), whose sum is σ = 143448732. Its totient is φ = 42503296.

The previous prime is 90319531. The next prime is 90319549. The reversal of 90319538 is 83591309.

It can be written as a sum of positive squares in 2 ways, for example, as 82937449 + 7382089 = 9107^2 + 2717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90319531) 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, 1328195 + ... + 1328262.

Almost surely, 2^90319538 is an apocalyptic number.

90319538 is a deficient number, since it is larger than the sum of its proper divisors (53129194).

90319538 is a wasteful number, since it uses less digits than its factorization.

90319538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656476.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 90319538 is about 9503.6591900173. The cubic root of 90319538 is about 448.6702108537.

The spelling of 90319538 in words is "ninety million, three hundred nineteen thousand, five hundred thirty-eight".