1044396864 has 168 divisors, whose sum is σ = 3601557440. Its totient is φ = 282673152.

The previous prime is 1044396841. The next prime is 1044396889. The reversal of 1044396864 is 4686934401.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69792 + ... + 83424.

Almost surely, 2^1044396864 is an apocalyptic number.

1044396864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1044396864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800778720).

1044396864 is an abundant number, since it is smaller than the sum of its proper divisors (2557160576).

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

1044396864 is a wasteful number, since it uses less digits than its factorization.

1044396864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13677 (or 13664 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 1044396864 is about 32317.1295755053. The cubic root of 1044396864 is about 1014.5851925980.

The spelling of 1044396864 in words is "one billion, forty-four million, three hundred ninety-six thousand, eight hundred sixty-four".