290464640 has 32 divisors (see below), whose sum is σ = 694393560. Its totient is φ = 116185600.

The previous prime is 290464639. The next prime is 290464679. The reversal of 290464640 is 46464092.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 290464640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226286 + ... + 227565.

Almost surely, 2^290464640 is an apocalyptic number.

290464640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290464640 is an abundant number, since it is smaller than the sum of its proper divisors (403928920).

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

290464640 is an equidigital number, since it uses as much as digits as its factorization.

290464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453870 (or 453858 counting only the distinct ones).

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

The square root of 290464640 is about 17043.0232059925. The cubic root of 290464640 is about 662.2639120806.

The spelling of 290464640 in words is "two hundred ninety million, four hundred sixty-four thousand, six hundred forty".