1063981944 has 48 divisors (see below), whose sum is σ = 2885641200. Its totient is φ = 354165504.

The previous prime is 1063981937. The next prime is 1063981949. The reversal of 1063981944 is 4491893601.

1063981944 is a `hidden beast` number, since 1 + 0 + 639 + 8 + 1 + 9 + 4 + 4 = 666.

It is a super-2 number, since 2×1063981944² = 2264115154316038272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1063981944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063981949) 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, 43552 + ... + 63440.

It is an arithmetic number, because the mean of its divisors is an integer number (60117525).

Almost surely, 2^1063981944 is an apocalyptic number.

It is an amenable number.

1063981944 is an abundant number, since it is smaller than the sum of its proper divisors (1821659256).

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

1063981944 is a wasteful number, since it uses less digits than its factorization.

1063981944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20644 (or 20637 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1063981944 is about 32618.7360883281. The cubic root of 1063981944 is about 1020.8879695376.

The spelling of 1063981944 in words is "one billion, sixty-three million, nine hundred eighty-one thousand, nine hundred forty-four".