404916138 has 32 divisors (see below), whose sum is σ = 981616320. Its totient is φ = 122701680.

The previous prime is 404916137. The next prime is 404916151. The reversal of 404916138 is 831619404.

It is not an unprimeable number, because it can be changed into a prime (404916137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340245 + ... + 341432.

It is an arithmetic number, because the mean of its divisors is an integer number (30675510).

Almost surely, 2^404916138 is an apocalyptic number.

404916138 is an abundant number, since it is smaller than the sum of its proper divisors (576700182).

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

404916138 is a wasteful number, since it uses less digits than its factorization.

404916138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681699 (or 681693 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 404916138 is about 20122.5281214861. The cubic root of 404916138 is about 739.8125517426.

The spelling of 404916138 in words is "four hundred four million, nine hundred sixteen thousand, one hundred thirty-eight".