90015642 has 24 divisors (see below), whose sum is σ = 195302016. Its totient is φ = 29963976.

The previous prime is 90015613. The next prime is 90015649. The reversal of 90015642 is 24651009.

90015642 is a `hidden beast` number, since 9 + 0 + 0 + 15 + 642 = 666.

It is not an unprimeable number, because it can be changed into a prime (90015649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11863 + ... + 17909.

It is an arithmetic number, because the mean of its divisors is an integer number (8137584).

Almost surely, 2^90015642 is an apocalyptic number.

90015642 is an abundant number, since it is smaller than the sum of its proper divisors (105286374).

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

90015642 is a wasteful number, since it uses less digits than its factorization.

90015642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882 (or 6879 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 90015642 is about 9487.6573504738. The cubic root of 90015642 is about 448.1664354233.

The spelling of 90015642 in words is "ninety million, fifteen thousand, six hundred forty-two".