1344026640 has 80 divisors (see below), whose sum is σ = 4545262656. Its totient is φ = 325824000.

The previous prime is 1344026639. The next prime is 1344026657. The reversal of 1344026640 is 466204431.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1344026598 and 1344026607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251911 + ... + 257190.

Almost surely, 2^1344026640 is an apocalyptic number.

1344026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1344026640 is an abundant number, since it is smaller than the sum of its proper divisors (3201236016).

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

1344026640 is a wasteful number, since it uses less digits than its factorization.

1344026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509128 (or 509122 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1344026640 is about 36660.9688906335. The cubic root of 1344026640 is about 1103.5769619467.

The spelling of 1344026640 in words is "one billion, three hundred forty-four million, twenty-six thousand, six hundred forty".