90644604 has 48 divisors (see below), whose sum is σ = 224169120. Its totient is φ = 28456960.

The previous prime is 90644581. The next prime is 90644641. The reversal of 90644604 is 40644609.

It is a congruent number.

It is an unprimeable number.

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, 11092 + ... + 17444.

It is an arithmetic number, because the mean of its divisors is an integer number (4670190).

Almost surely, 2^90644604 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 90644604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112084560).

90644604 is an abundant number, since it is smaller than the sum of its proper divisors (133524516).

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

90644604 is a wasteful number, since it uses less digits than its factorization.

90644604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430 (or 6428 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 90644604 is about 9520.7459791762. The cubic root of 90644604 is about 449.2078309947.

The spelling of 90644604 in words is "ninety million, six hundred forty-four thousand, six hundred four".