1337721648 has 20 divisors (see below), whose sum is σ = 3455781048. Its totient is φ = 445907200.

The previous prime is 1337721647. The next prime is 1337721659. The reversal of 1337721648 is 8461277331.

It is not an unprimeable number, because it can be changed into a prime (1337721647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13934553 + ... + 13934648.

Almost surely, 2^1337721648 is an apocalyptic number.

It is an amenable number.

1337721648 is an abundant number, since it is smaller than the sum of its proper divisors (2118059400).

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

1337721648 is a wasteful number, since it uses less digits than its factorization.

1337721648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27869212 (or 27869206 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 1337721648 is about 36574.8772793567. The cubic root of 1337721648 is about 1101.8485853167.

Adding to 1337721648 its reverse (8461277331), we get a palindrome (9798998979).

The spelling of 1337721648 in words is "one billion, three hundred thirty-seven million, seven hundred twenty-one thousand, six hundred forty-eight".