404137690 has 16 divisors (see below), whose sum is σ = 793579680. Its totient is φ = 146959120.

The previous prime is 404137661. The next prime is 404137691. The reversal of 404137690 is 96731404.

It is a happy number.

It is a super-2 number, since 2×404137690² = 326654544957072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404137691) 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, 1836880 + ... + 1837099.

It is an arithmetic number, because the mean of its divisors is an integer number (49598730).

Almost surely, 2^404137690 is an apocalyptic number.

404137690 is a deficient number, since it is larger than the sum of its proper divisors (389441990).

404137690 is a wasteful number, since it uses less digits than its factorization.

404137690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673997.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 404137690 is about 20103.1761172209. The cubic root of 404137690 is about 739.3381530546.

The spelling of 404137690 in words is "four hundred four million, one hundred thirty-seven thousand, six hundred ninety".