90750638 has 16 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 40668600.

The previous prime is 90750619. The next prime is 90750661. The reversal of 90750638 is 83605709.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27488 + ... + 30611.

It is an arithmetic number, because the mean of its divisors is an integer number (9412200).

Almost surely, 2^90750638 is an apocalyptic number.

90750638 is a deficient number, since it is larger than the sum of its proper divisors (59844562).

90750638 is a wasteful number, since it uses less digits than its factorization.

90750638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58183.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 90750638 is about 9526.3129278856. The cubic root of 90750638 is about 449.3829204482.

Subtracting from 90750638 its reverse (83605709), we obtain a square (7144929 = 2673²).

The spelling of 90750638 in words is "ninety million, seven hundred fifty thousand, six hundred thirty-eight".