90409432 has 16 divisors (see below), whose sum is σ = 171266760. Its totient is φ = 44738304.

The previous prime is 90409409. The next prime is 90409433. The reversal of 90409432 is 23490409.

It is a junction number, because it is equal to n+sod(n) for n = 90409394 and 90409403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90409433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57478 + ... + 59029.

Almost surely, 2^90409432 is an apocalyptic number.

It is an amenable number.

90409432 is a deficient number, since it is larger than the sum of its proper divisors (80857328).

90409432 is a wasteful number, since it uses less digits than its factorization.

90409432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116610 (or 116606 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 90409432 is about 9508.3874552944. The cubic root of 90409432 is about 448.8190136019.

The spelling of 90409432 in words is "ninety million, four hundred nine thousand, four hundred thirty-two".