404023156 has 36 divisors (see below), whose sum is σ = 753894988. Its totient is φ = 189416448.

The previous prime is 404023153. The next prime is 404023171. The reversal of 404023156 is 651320404.

It can be written as a sum of positive squares in 6 ways, for example, as 656100 + 403367056 = 810^2 + 20084^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404023156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404023153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430720 + ... + 431656.

Almost surely, 2^404023156 is an apocalyptic number.

It is an amenable number.

404023156 is a deficient number, since it is larger than the sum of its proper divisors (349871832).

404023156 is a wasteful number, since it uses less digits than its factorization.

404023156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 404023156 is about 20100.3272610174. The cubic root of 404023156 is about 739.2683028040.

The spelling of 404023156 in words is "four hundred four million, twenty-three thousand, one hundred fifty-six".