1397356144 has 10 divisors (see below), whose sum is σ = 2707377560. Its totient is φ = 698678064.

The previous prime is 1397356127. The next prime is 1397356153. The reversal of 1397356144 is 4416537931.

It is a self number, because there is not a number n which added to its sum of digits gives 1397356144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43667364 + ... + 43667395.

It is an arithmetic number, because the mean of its divisors is an integer number (270737756).

Almost surely, 2^1397356144 is an apocalyptic number.

It is an amenable number.

1397356144 is a deficient number, since it is larger than the sum of its proper divisors (1310021416).

1397356144 is an equidigital number, since it uses as much as digits as its factorization.

1397356144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87334767 (or 87334761 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 1397356144 is about 37381.2271601669. The cubic root of 1397356144 is about 1117.9842953579.

The spelling of 1397356144 in words is "one billion, three hundred ninety-seven million, three hundred fifty-six thousand, one hundred forty-four".