1397274624 has 120 divisors (see below), whose sum is σ = 4174049880. Its totient is φ = 465702912.

The previous prime is 1397274617. The next prime is 1397274643. The reversal of 1397274624 is 4264727931.

1397274624 is a `hidden beast` number, since 13 + 9 + 7 + 2 + 7 + 4 + 624 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1397274624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 161677 + ... + 170099.

It is an arithmetic number, because the mean of its divisors is an integer number (34783749).

Almost surely, 2^1397274624 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 1397274624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087024940).

1397274624 is an abundant number, since it is smaller than the sum of its proper divisors (2776775256).

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

1397274624 is an frugal number, since it uses more digits than its factorization.

1397274624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8457 (or 8428 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 1397274624 is about 37380.1367573742. The cubic root of 1397274624 is about 1117.9625543359.

The spelling of 1397274624 in words is "one billion, three hundred ninety-seven million, two hundred seventy-four thousand, six hundred twenty-four".