404991912 has 64 divisors (see below), whose sum is σ = 1137790080. Its totient is φ = 119192832.

The previous prime is 404991877. The next prime is 404991913. The reversal of 404991912 is 219199404.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (404991913) 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, 21043 + ... + 35394.

It is an arithmetic number, because the mean of its divisors is an integer number (17777970).

Almost surely, 2^404991912 is an apocalyptic number.

It is an amenable number.

404991912 is an abundant number, since it is smaller than the sum of its proper divisors (732798168).

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

404991912 is a wasteful number, since it uses less digits than its factorization.

404991912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56482 (or 56478 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 404991912 is about 20124.4108485193. The cubic root of 404991912 is about 739.8586971495.

The spelling of 404991912 in words is "four hundred four million, nine hundred ninety-one thousand, nine hundred twelve".