90861912 has 80 divisors (see below), whose sum is σ = 255915000. Its totient is φ = 30119040.

The previous prime is 90861907. The next prime is 90861917. The reversal of 90861912 is 21916809.

It is an interprime number because it is at equal distance from previous prime (90861907) and next prime (90861917).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90861917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 181839 + ... + 182337.

Almost surely, 2^90861912 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 90861912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127957500).

90861912 is an abundant number, since it is smaller than the sum of its proper divisors (165053088).

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

90861912 is a wasteful number, since it uses less digits than its factorization.

90861912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 90861912 is about 9532.1514885151. The cubic root of 90861912 is about 449.5665158930.

The spelling of 90861912 in words is "ninety million, eight hundred sixty-one thousand, nine hundred twelve".