290426605 has 32 divisors (see below), whose sum is σ = 404490240. Its totient is φ = 196084800.

The previous prime is 290426599. The next prime is 290426621. The reversal of 290426605 is 506624092.

It is not a de Polignac number, because 290426605 - 2²³ = 282037997 is a prime.

It is a super-2 number, since 2×290426605² = 168695225783652050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 945862 + ... + 946168.

It is an arithmetic number, because the mean of its divisors is an integer number (12640320).

Almost surely, 2^290426605 is an apocalyptic number.

It is an amenable number.

290426605 is a deficient number, since it is larger than the sum of its proper divisors (114063635).

290426605 is a wasteful number, since it uses less digits than its factorization.

290426605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 290426605 is about 17041.9073169643. The cubic root of 290426605 is about 662.2350040209.

The spelling of 290426605 in words is "two hundred ninety million, four hundred twenty-six thousand, six hundred five".