290864 has 40 divisors (see below), whose sum is σ = 669600. Its totient is φ = 122304.

The previous prime is 290861. The next prime is 290869. The reversal of 290864 is 468092.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290864.

It is not an unprimeable number, because it can be changed into a prime (290861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5462 + ... + 5514.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2²⁹⁰⁸⁶⁴ 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 290864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334800).

290864 is an abundant number, since it is smaller than the sum of its proper divisors (378736).

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

290864 is an equidigital number, since it uses as much as digits as its factorization.

290864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 290864 is about 539.3180879592. The cubic root of 290864 is about 66.2567288763.

The spelling of 290864 in words is "two hundred ninety thousand, eight hundred sixty-four".