90057438 has 12 divisors (see below), whose sum is σ = 195124488. Its totient is φ = 30019140.

The previous prime is 90057427. The next prime is 90057439. The reversal of 90057438 is 83475009.

It is a super-2 number, since 2×90057438² = 16220684278247688, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90057439) 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, 2501578 + ... + 2501613.

It is an arithmetic number, because the mean of its divisors is an integer number (16260374).

Almost surely, 2^90057438 is an apocalyptic number.

90057438 is an abundant number, since it is smaller than the sum of its proper divisors (105067050).

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

90057438 is a wasteful number, since it uses less digits than its factorization.

90057438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003199 (or 5003196 counting only the distinct ones).

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

The square root of 90057438 is about 9489.8597460658. The cubic root of 90057438 is about 448.2357887991.

The spelling of 90057438 in words is "ninety million, fifty-seven thousand, four hundred thirty-eight".