1244928880 has 80 divisors (see below), whose sum is σ = 3130674624. Its totient is φ = 457666560.

The previous prime is 1244928857. The next prime is 1244928953. The reversal of 1244928880 is 888294421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1244928880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248157 + ... + 253123.

Almost surely, 2^1244928880 is an apocalyptic number.

1244928880 is a gapful number since it is divisible by the number (10) 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 1244928880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565337312).

1244928880 is an abundant number, since it is smaller than the sum of its proper divisors (1885745744).

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

1244928880 is a wasteful number, since it uses less digits than its factorization.

1244928880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 1244928880 is about 35283.5497080438. The cubic root of 1244928880 is about 1075.7586510647.

The spelling of 1244928880 in words is "one billion, two hundred forty-four million, nine hundred twenty-eight thousand, eight hundred eighty".