1397563456 has 21 divisors (see below), whose sum is σ = 2773883581. Its totient is φ = 698632192.

The previous prime is 1397563417. The next prime is 1397563457. The reversal of 1397563456 is 6543657931.

The square root of 1397563456 is 37384.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1339560000 + 58003456 = 36600^2 + 7616^2 .

It is a super-2 number, since 2×1397563456² = 3906367227093327872, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397563457) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 296736 + ... + 301408.

Almost surely, 2^1397563456 is an apocalyptic number.

1397563456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1397563456 is the 37384-th square number.

It is an amenable number.

1397563456 is a deficient number, since it is larger than the sum of its proper divisors (1376320125).

1397563456 is an frugal number, since it uses more digits than its factorization.

1397563456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9358 (or 4675 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 49.

The cubic root of 1397563456 is about 1118.0395807386.

Multiplying 1397563456 by its sum of digits (49), we get a square (68480609344 = 261688²).

The spelling of 1397563456 in words is "one billion, three hundred ninety-seven million, five hundred sixty-three thousand, four hundred fifty-six".