90040432 has 20 divisors (see below), whose sum is σ = 184715856. Its totient is φ = 42371840.

The previous prime is 90040427. The next prime is 90040439. The reversal of 90040432 is 23404009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90040439) 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, 165244 + ... + 165787.

Almost surely, 2^90040432 is an apocalyptic number.

It is an amenable number.

90040432 is an abundant number, since it is smaller than the sum of its proper divisors (94675424).

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

90040432 is a wasteful number, since it uses less digits than its factorization.

90040432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331056 (or 331050 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 90040432 is about 9488.9636947351. The cubic root of 90040432 is about 448.2075728151.

The spelling of 90040432 in words is "ninety million, forty thousand, four hundred thirty-two".