90687912 has 64 divisors (see below), whose sum is σ = 272755200. Its totient is φ = 24546240.

The previous prime is 90687887. The next prime is 90687913. The reversal of 90687912 is 21978609.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (90687913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11014 + ... + 17397.

It is an arithmetic number, because the mean of its divisors is an integer number (4261800).

Almost surely, 2^90687912 is an apocalyptic number.

It is an amenable number.

90687912 is an abundant number, since it is smaller than the sum of its proper divisors (182067288).

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

90687912 is a wasteful number, since it uses less digits than its factorization.

90687912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28446 (or 28442 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 90687912 is about 9523.0201091881. The cubic root of 90687912 is about 449.2793601478.

The spelling of 90687912 in words is "ninety million, six hundred eighty-seven thousand, nine hundred twelve".