90816312 has 128 divisors (see below), whose sum is σ = 253108800. Its totient is φ = 27033600.

The previous prime is 90816287. The next prime is 90816317. The reversal of 90816312 is 21361809.

It is a self number, because there is not a number n which added to its sum of digits gives 90816312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90816317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020364 + ... + 1020452.

Almost surely, 2^90816312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90816312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126554400).

90816312 is an abundant number, since it is smaller than the sum of its proper divisors (162292488).

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

90816312 is a wasteful number, since it uses less digits than its factorization.

90816312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 90816312 is about 9529.7592834237. The cubic root of 90816312 is about 449.4912967572.

The spelling of 90816312 in words is "ninety million, eight hundred sixteen thousand, three hundred twelve".