404021634 has 24 divisors (see below), whose sum is σ = 844709712. Its totient is φ = 128817480.

The previous prime is 404021633. The next prime is 404021663. The reversal of 404021634 is 436120404.

It is not an unprimeable number, because it can be changed into a prime (404021633) 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, 60472 + ... + 66819.

It is an arithmetic number, because the mean of its divisors is an integer number (35196238).

Almost surely, 2^404021634 is an apocalyptic number.

404021634 is an abundant number, since it is smaller than the sum of its proper divisors (440688078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404021634 is a wasteful number, since it uses less digits than its factorization.

404021634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127342 (or 127319 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 404021634 is about 20100.2894009017. The cubic root of 404021634 is about 739.2673745009.

The spelling of 404021634 in words is "four hundred four million, twenty-one thousand, six hundred thirty-four".