1399957456 has 20 divisors (see below), whose sum is σ = 2785727332. Its totient is φ = 681060096.

The previous prime is 1399957439. The next prime is 1399957469. The reversal of 1399957456 is 6547599931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1253160000 + 146797456 = 35400^2 + 12116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1399957456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181805 + ... + 1182988.

Almost surely, 2^1399957456 is an apocalyptic number.

1399957456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399957456 is a deficient number, since it is larger than the sum of its proper divisors (1385769876).

1399957456 is a wasteful number, since it uses less digits than its factorization.

1399957456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364838 (or 2364832 counting only the distinct ones).

The product of its digits is 9185400, while the sum is 58.

The square root of 1399957456 is about 37416.0053453064. The cubic root of 1399957456 is about 1118.6776101803.

The spelling of 1399957456 in words is "one billion, three hundred ninety-nine million, nine hundred fifty-seven thousand, four hundred fifty-six".