1397202688 has 54 divisors (see below), whose sum is σ = 3190982424. Its totient is φ = 598123008.

The previous prime is 1397202679. The next prime is 1397202701. The reversal of 1397202688 is 8862027931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1581895 + ... + 1582777.

Almost surely, 2^1397202688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397202688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595491212).

1397202688 is an abundant number, since it is smaller than the sum of its proper divisors (1793779736).

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

1397202688 is an frugal number, since it uses more digits than its factorization.

1397202688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1397202688 is about 37379.1745227205. The cubic root of 1397202688 is about 1117.9433686218.

The spelling of 1397202688 in words is "one billion, three hundred ninety-seven million, two hundred two thousand, six hundred eighty-eight".