90840912 has 80 divisors (see below), whose sum is σ = 248317440. Its totient is φ = 28569600.

The previous prime is 90840907. The next prime is 90840917. The reversal of 90840912 is 21904809.

It is an interprime number because it is at equal distance from previous prime (90840907) and next prime (90840917).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90840917) 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 15 ways as a sum of consecutive naturals, for example, 60264 + ... + 61752.

It is an arithmetic number, because the mean of its divisors is an integer number (3103968).

Almost surely, 2^90840912 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 90840912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124158720).

90840912 is an abundant number, since it is smaller than the sum of its proper divisors (157476528).

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

90840912 is a wasteful number, since it uses less digits than its factorization.

90840912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 90840912 is about 9531.0498897026. The cubic root of 90840912 is about 449.5318786285.

The spelling of 90840912 in words is "ninety million, eight hundred forty thousand, nine hundred twelve".