90288004 has 9 divisors (see below), whose sum is σ = 158037271. Its totient is φ = 45134500.

The previous prime is 90288001. The next prime is 90288043. The reversal of 90288004 is 40088209.

The square root of 90288004 is 9502.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90288001) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 16629 + ... + 21379.

Almost surely, 2^90288004 is an apocalyptic number.

90288004 is the 9502-nd square number.

It is an amenable number.

90288004 is a deficient number, since it is larger than the sum of its proper divisors (67749267).

90288004 is an frugal number, since it uses more digits than its factorization.

90288004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9506 (or 4753 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The cubic root of 90288004 is about 448.6179888073.

The spelling of 90288004 in words is "ninety million, two hundred eighty-eight thousand, four".