1444720564 has 48 divisors (see below), whose sum is σ = 2926828800. Its totient is φ = 611193600.

The previous prime is 1444720517. The next prime is 1444720573. The reversal of 1444720564 is 4650274441.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1376712 + ... + 1377760.

It is an arithmetic number, because the mean of its divisors is an integer number (60975600).

Almost surely, 2^1444720564 is an apocalyptic number.

1444720564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1444720564 is an abundant number, since it is smaller than the sum of its proper divisors (1482108236).

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

1444720564 is a wasteful number, since it uses less digits than its factorization.

1444720564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

The square root of 1444720564 is about 38009.4799227772. The cubic root of 1444720564 is about 1130.4758389640.

The spelling of 1444720564 in words is "one billion, four hundred forty-four million, seven hundred twenty thousand, five hundred sixty-four".