290404290 has 64 divisors (see below), whose sum is σ = 767947392. Its totient is φ = 69696000.

The previous prime is 290404267. The next prime is 290404297. The reversal of 290404290 is 92404092.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (290404297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28974 + ... + 37686.

It is an arithmetic number, because the mean of its divisors is an integer number (11999178).

Almost surely, 2^290404290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290404290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383973696).

290404290 is an abundant number, since it is smaller than the sum of its proper divisors (477543102).

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

290404290 is a wasteful number, since it uses less digits than its factorization.

290404290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 290404290 is about 17041.2525948065. The cubic root of 290404290 is about 662.2180425897.

The spelling of 290404290 in words is "two hundred ninety million, four hundred four thousand, two hundred ninety".