90664404 has 12 divisors (see below), whose sum is σ = 211550304. Its totient is φ = 30221464.

The previous prime is 90664403. The next prime is 90664433. The reversal of 90664404 is 40446609.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90664403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3777672 + ... + 3777695.

It is an arithmetic number, because the mean of its divisors is an integer number (17629192).

Almost surely, 2^90664404 is an apocalyptic number.

It is an amenable number.

90664404 is an abundant number, since it is smaller than the sum of its proper divisors (120885900).

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

90664404 is a wasteful number, since it uses less digits than its factorization.

90664404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555374 (or 7555372 counting only the distinct ones).

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

The square root of 90664404 is about 9521.7857568841. The cubic root of 90664404 is about 449.2405362602.

The spelling of 90664404 in words is "ninety million, six hundred sixty-four thousand, four hundred four".