90918624 has 48 divisors (see below), whose sum is σ = 242040960. Its totient is φ = 29877120.

The previous prime is 90918623. The next prime is 90918631. The reversal of 90918624 is 42681909.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90918623) 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, 147 + ... + 13485.

It is an arithmetic number, because the mean of its divisors is an integer number (5042520).

Almost surely, 2^90918624 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 90918624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121020480).

90918624 is an abundant number, since it is smaller than the sum of its proper divisors (151122336).

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

90918624 is a wasteful number, since it uses less digits than its factorization.

90918624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13423 (or 13415 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 90918624 is about 9535.1257988555. The cubic root of 90918624 is about 449.6600296403.

The spelling of 90918624 in words is "ninety million, nine hundred eighteen thousand, six hundred twenty-four".