290426 has 4 divisors (see below), whose sum is σ = 435642. Its totient is φ = 145212.

The previous prime is 290419. The next prime is 290429. The reversal of 290426 is 624092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 87025 = 451^2 + 295^2 .

It is a super-2 number, since 2×290426² = 168694522952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (290429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72605 + ... + 72608.

2²⁹⁰⁴²⁶ is an apocalyptic number.

290426 is a deficient number, since it is larger than the sum of its proper divisors (145216).

290426 is a wasteful number, since it uses less digits than its factorization.

290426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145215.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 290426 is about 538.9118666350. The cubic root of 290426 is about 66.2234544177.

The spelling of 290426 in words is "two hundred ninety thousand, four hundred twenty-six".