1397648688 has 40 divisors (see below), whose sum is σ = 3613529136. Its totient is φ = 465504000.

The previous prime is 1397648687. The next prime is 1397648711. The reversal of 1397648688 is 8868467931.

It is not an unprimeable number, because it can be changed into a prime (1397648687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51258 + ... + 73638.

Almost surely, 2^1397648688 is an apocalyptic number.

It is an amenable number.

1397648688 is an abundant number, since it is smaller than the sum of its proper divisors (2215880448).

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

1397648688 is a wasteful number, since it uses less digits than its factorization.

1397648688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23693 (or 23687 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The square root of 1397648688 is about 37385.1399355412. The cubic root of 1397648688 is about 1118.0623085826.

The spelling of 1397648688 in words is "one billion, three hundred ninety-seven million, six hundred forty-eight thousand, six hundred eighty-eight".