1044990861 has 8 divisors (see below), whose sum is σ = 1466653920. Its totient is φ = 659994192.

The previous prime is 1044990803. The next prime is 1044990911. The reversal of 1044990861 is 1680994401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1044990861 - 2⁷ = 1044990733 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044990061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9166530 + ... + 9166643.

It is an arithmetic number, because the mean of its divisors is an integer number (183331740).

Almost surely, 2^1044990861 is an apocalyptic number.

It is an amenable number.

1044990861 is a deficient number, since it is larger than the sum of its proper divisors (421663059).

1044990861 is a wasteful number, since it uses less digits than its factorization.

1044990861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18333195.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1044990861 is about 32326.3183953880. The cubic root of 1044990861 is about 1014.7775033833. Note that the first 3 decimals are identical.

The spelling of 1044990861 in words is "one billion, forty-four million, nine hundred ninety thousand, eight hundred sixty-one".