90819312 has 40 divisors (see below), whose sum is σ = 240962256. Its totient is φ = 29454336.

The previous prime is 90819277. The next prime is 90819317. The reversal of 90819312 is 21391809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90819317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23793 + ... + 27344.

Almost surely, 2^90819312 is an apocalyptic number.

It is an amenable number.

90819312 is an abundant number, since it is smaller than the sum of its proper divisors (150142944).

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

90819312 is a wasteful number, since it uses less digits than its factorization.

90819312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51185 (or 51179 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 90819312 is about 9529.9166837911. The cubic root of 90819312 is about 449.4962461582.

The spelling of 90819312 in words is "ninety million, eight hundred nineteen thousand, three hundred twelve".