1399431608 has 32 divisors (see below), whose sum is σ = 2663618160. Its totient is φ = 689160960.

The previous prime is 1399431599. The next prime is 1399431617. The reversal of 1399431608 is 8061349931.

It is an interprime number because it is at equal distance from previous prime (1399431599) and next prime (1399431617).

It is a congruent number.

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, 595091 + ... + 597437.

Almost surely, 2^1399431608 is an apocalyptic number.

It is an amenable number.

1399431608 is a deficient number, since it is larger than the sum of its proper divisors (1264186552).

1399431608 is a wasteful number, since it uses less digits than its factorization.

1399431608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447 (or 3443 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1399431608 is about 37408.9776390641. The cubic root of 1399431608 is about 1118.5375278158.

The spelling of 1399431608 in words is "one billion, three hundred ninety-nine million, four hundred thirty-one thousand, six hundred eight".