90438312 has 32 divisors (see below), whose sum is σ = 227011680. Its totient is φ = 30024000.

The previous prime is 90438133. The next prime is 90438343. The reversal of 90438312 is 21383409.

It is a self number, because there is not a number n which added to its sum of digits gives 90438312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483 + ... + 13530.

It is an arithmetic number, because the mean of its divisors is an integer number (7094115).

Almost surely, 2^90438312 is an apocalyptic number.

It is an amenable number.

90438312 is an abundant number, since it is smaller than the sum of its proper divisors (136573368).

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

90438312 is a wasteful number, since it uses less digits than its factorization.

90438312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15273 (or 15269 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 90438312 is about 9509.9059932262. The cubic root of 90438312 is about 448.8667981192.

The spelling of 90438312 in words is "ninety million, four hundred thirty-eight thousand, three hundred twelve".