290804256 has 120 divisors (see below), whose sum is σ = 862069824. Its totient is φ = 96163200.

The previous prime is 290804243. The next prime is 290804287. The reversal of 290804256 is 652408092.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 290804256.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 391021 + ... + 391763.

Almost surely, 2^290804256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290804256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431034912).

290804256 is an abundant number, since it is smaller than the sum of its proper divisors (571265568).

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

290804256 is a wasteful number, since it uses less digits than its factorization.

290804256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 290804256 is about 17052.9837858364. The cubic root of 290804256 is about 662.5219214771.

It can be divided in two parts, 290 and 804256, that added together give a triangular number (804546 = T₁₂₆₈).

The spelling of 290804256 in words is "two hundred ninety million, eight hundred four thousand, two hundred fifty-six".