1399161376 has 48 divisors (see below), whose sum is σ = 2865844800. Its totient is φ = 671603968.

The previous prime is 1399161371. The next prime is 1399161389. The reversal of 1399161376 is 6731619931.

It is not an unprimeable number, because it can be changed into a prime (1399161371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161901 + ... + 170323.

It is an arithmetic number, because the mean of its divisors is an integer number (59705100).

Almost surely, 2^1399161376 is an apocalyptic number.

1399161376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399161376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432922400).

1399161376 is an abundant number, since it is smaller than the sum of its proper divisors (1466683424).

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

1399161376 is a wasteful number, since it uses less digits than its factorization.

1399161376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641 (or 8633 counting only the distinct ones).

The product of its digits is 183708, while the sum is 46.

The square root of 1399161376 is about 37405.3656044156. The cubic root of 1399161376 is about 1118.4655261809.

The spelling of 1399161376 in words is "one billion, three hundred ninety-nine million, one hundred sixty-one thousand, three hundred seventy-six".