1344639564 has 36 divisors (see below), whose sum is σ = 3403440040. Its totient is φ = 447621120.

The previous prime is 1344639553. The next prime is 1344639581. The reversal of 1344639564 is 4659364431.

1344639564 is a `hidden beast` number, since 1 + 3 + 4 + 4 + 639 + 5 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1344639564² = 3616111114148220192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3399 + ... + 51969.

Almost surely, 2^1344639564 is an apocalyptic number.

It is an amenable number.

1344639564 is an abundant number, since it is smaller than the sum of its proper divisors (2058800476).

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

1344639564 is a wasteful number, since it uses less digits than its factorization.

1344639564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49350 (or 49345 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 1344639564 is about 36669.3272913480. The cubic root of 1344639564 is about 1103.7446932475.

The spelling of 1344639564 in words is "one billion, three hundred forty-four million, six hundred thirty-nine thousand, five hundred sixty-four".