90138936 has 32 divisors (see below), whose sum is σ = 226195200. Its totient is φ = 29933280.

The previous prime is 90138929. The next prime is 90138943. The reversal of 90138936 is 63983109.

It is an interprime number because it is at equal distance from previous prime (90138929) and next prime (90138943).

It is a junction number, because it is equal to n+sod(n) for n = 90138894 and 90138903.

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, 426 + ... + 13433.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^90138936 is an apocalyptic number.

It is an amenable number.

90138936 is an abundant number, since it is smaller than the sum of its proper divisors (136056264).

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

90138936 is a wasteful number, since it uses less digits than its factorization.

90138936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14139 (or 14135 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 90138936 is about 9494.1527268103. The cubic root of 90138936 is about 448.3709592237.

The spelling of 90138936 in words is "ninety million, one hundred thirty-eight thousand, nine hundred thirty-six".