1399052656 has 20 divisors (see below), whose sum is σ = 2716533472. Its totient is φ = 698011776.

The previous prime is 1399052651. The next prime is 1399052729. The reversal of 1399052656 is 6562509931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399052651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87021 + ... + 101836.

Almost surely, 2^1399052656 is an apocalyptic number.

1399052656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399052656 is a deficient number, since it is larger than the sum of its proper divisors (1317480816).

1399052656 is a wasteful number, since it uses less digits than its factorization.

1399052656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189328 (or 189322 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 46.

The square root of 1399052656 is about 37403.9123087412. The cubic root of 1399052656 is about 1118.4365557981.

The spelling of 1399052656 in words is "one billion, three hundred ninety-nine million, fifty-two thousand, six hundred fifty-six".