90138632 has 16 divisors (see below), whose sum is σ = 169419600. Its totient is φ = 44960080.

The previous prime is 90138599. The next prime is 90138649. The reversal of 90138632 is 23683109.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10094 + ... + 16797.

It is an arithmetic number, because the mean of its divisors is an integer number (10588725).

Almost surely, 2^90138632 is an apocalyptic number.

It is an amenable number.

90138632 is a deficient number, since it is larger than the sum of its proper divisors (79280968).

90138632 is a wasteful number, since it uses less digits than its factorization.

90138632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27316 (or 27312 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90138632 is about 9494.1367169427. The cubic root of 90138632 is about 448.3704551688.

The spelling of 90138632 in words is "ninety million, one hundred thirty-eight thousand, six hundred thirty-two".