1044391812 has 24 divisors (see below), whose sum is σ = 2442213312. Its totient is φ = 347373600.

The previous prime is 1044391807. The next prime is 1044391823. The reversal of 1044391812 is 2181934401.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88864 + ... + 99927.

It is an arithmetic number, because the mean of its divisors is an integer number (101758888).

Almost surely, 2^1044391812 is an apocalyptic number.

1044391812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1044391812 is an abundant number, since it is smaller than the sum of its proper divisors (1397821500).

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

1044391812 is a wasteful number, since it uses less digits than its factorization.

1044391812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189259 (or 189257 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1044391812 is about 32317.0514125283. The cubic root of 1044391812 is about 1014.5835566641.

The spelling of 1044391812 in words is "one billion, forty-four million, three hundred ninety-one thousand, eight hundred twelve".