290402 has 8 divisors (see below), whose sum is σ = 497856. Its totient is φ = 124452.

The previous prime is 290399. The next prime is 290419. The reversal of 290402 is 204092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290402.

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, 10358 + ... + 10385.

It is an arithmetic number, because the mean of its divisors is an integer number (62232).

2²⁹⁰⁴⁰² is an apocalyptic number.

290402 is a deficient number, since it is larger than the sum of its proper divisors (207454).

290402 is a wasteful number, since it uses less digits than its factorization.

290402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20752.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 290402 is about 538.8895990832. The cubic root of 290402 is about 66.2216301932.

Adding to 290402 its reverse (204092), we get a palindrome (494494).

The spelling of 290402 in words is "two hundred ninety thousand, four hundred two".