290023402 has 8 divisors (see below), whose sum is σ = 442167012. Its totient is φ = 142634400.

The previous prime is 290023397. The next prime is 290023421. The reversal of 290023402 is 204320092.

It can be written as a sum of positive squares in 2 ways, for example, as 228886641 + 61136761 = 15129^2 + 7819^2 .

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

It is a super-2 number, since 2×290023402² = 168227147415307208, which contains 22 as substring.

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, 1188499 + ... + 1188742.

Almost surely, 2^290023402 is an apocalyptic number.

290023402 is a deficient number, since it is larger than the sum of its proper divisors (152143610).

290023402 is a wasteful number, since it uses less digits than its factorization.

290023402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377304.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 290023402 is about 17030.0734584440. The cubic root of 290023402 is about 661.9283989579.

Adding to 290023402 its reverse (204320092), we get a palindrome (494343494).

The spelling of 290023402 in words is "two hundred ninety million, twenty-three thousand, four hundred two".