90418788 has 72 divisors (see below), whose sum is σ = 240144800. Its totient is φ = 29420496.

The previous prime is 90418753. The next prime is 90418799. The reversal of 90418788 is 88781409.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238383 + ... + 238761.

Almost surely, 2^90418788 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 90418788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120072400).

90418788 is an abundant number, since it is smaller than the sum of its proper divisors (149726012).

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

90418788 is a wasteful number, since it uses less digits than its factorization.

90418788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 90418788 is about 9508.8794292493. The cubic root of 90418788 is about 448.8344950466.

The spelling of 90418788 in words is "ninety million, four hundred eighteen thousand, seven hundred eighty-eight".