404671690 has 16 divisors (see below), whose sum is σ = 766746720. Its totient is φ = 153349200.

The previous prime is 404671679. The next prime is 404671691. The reversal of 404671690 is 96176404.

It is a super-2 number, since 2×404671690² = 327518353374912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404671691) 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, 1064736 + ... + 1065115.

It is an arithmetic number, because the mean of its divisors is an integer number (47921670).

Almost surely, 2^404671690 is an apocalyptic number.

404671690 is a deficient number, since it is larger than the sum of its proper divisors (362075030).

404671690 is a wasteful number, since it uses less digits than its factorization.

404671690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129877.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 404671690 is about 20116.4532162109. The cubic root of 404671690 is about 739.6636467505.

The spelling of 404671690 in words is "four hundred four million, six hundred seventy-one thousand, six hundred ninety".