1399965616 has 40 divisors (see below), whose sum is σ = 3150757664. Its totient is φ = 590146560.

The previous prime is 1399965571. The next prime is 1399965647. The reversal of 1399965616 is 6165699931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95625 + ... + 109288.

Almost surely, 2^1399965616 is an apocalyptic number.

1399965616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399965616 is an abundant number, since it is smaller than the sum of its proper divisors (1750792048).

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

1399965616 is a wasteful number, since it uses less digits than its factorization.

1399965616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204989 (or 204983 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 55.

The square root of 1399965616 is about 37416.1143893911. The cubic root of 1399965616 is about 1118.6797836729.

The spelling of 1399965616 in words is "one billion, three hundred ninety-nine million, nine hundred sixty-five thousand, six hundred sixteen".