90209004 has 24 divisors (see below), whose sum is σ = 222869808. Its totient is φ = 28300800.

The previous prime is 90208999. The next prime is 90209011. The reversal of 90209004 is 40090209.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220897 + ... + 221304.

It is an arithmetic number, because the mean of its divisors is an integer number (9286242).

Almost surely, 2^90209004 is an apocalyptic number.

It is an amenable number.

90209004 is an abundant number, since it is smaller than the sum of its proper divisors (132660804).

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

90209004 is a wasteful number, since it uses less digits than its factorization.

90209004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442225 (or 442223 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 90209004 is about 9497.8420707022. The cubic root of 90209004 is about 448.4871070318.

The spelling of 90209004 in words is "ninety million, two hundred nine thousand, four".