90909084 has 96 divisors (see below), whose sum is σ = 254983680. Its totient is φ = 24659712.

The previous prime is 90909073. The next prime is 90909089. The reversal of 90909084 is 48090909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909089) 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, 162934 + ... + 163490.

It is an arithmetic number, because the mean of its divisors is an integer number (2656080).

Almost surely, 2^90909084 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 90909084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127491840).

90909084 is an abundant number, since it is smaller than the sum of its proper divisors (164074596).

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

90909084 is a wasteful number, since it uses less digits than its factorization.

90909084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 90909084 is about 9534.6255301401. The cubic root of 90909084 is about 449.6443016316.

The spelling of 90909084 in words is "ninety million, nine hundred nine thousand, eighty-four".