290404664 has 32 divisors (see below), whose sum is σ = 625276800. Its totient is φ = 125053920.

The previous prime is 290404643. The next prime is 290404691. The reversal of 290404664 is 466404092.

It is a super-3 number, since 3×290404664³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 85172 + ... + 88515.

It is an arithmetic number, because the mean of its divisors is an integer number (19539900).

Almost surely, 2^290404664 is an apocalyptic number.

It is an amenable number.

290404664 is an abundant number, since it is smaller than the sum of its proper divisors (334872136).

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

290404664 is a wasteful number, since it uses less digits than its factorization.

290404664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173723 (or 173719 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 290404664 is about 17041.2635681747. The cubic root of 290404664 is about 662.2183268709.

The spelling of 290404664 in words is "two hundred ninety million, four hundred four thousand, six hundred sixty-four".