1399161648 has 30 divisors (see below), whose sum is σ = 3615170524. Its totient is φ = 466300832.

The previous prime is 1399161607. The next prime is 1399161661. The reversal of 1399161648 is 8461619931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1399161597 and 1399161606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256453 + ... + 261851.

Almost surely, 2^1399161648 is an apocalyptic number.

It is an amenable number.

1399161648 is an abundant number, since it is smaller than the sum of its proper divisors (2216008876).

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

1399161648 is an frugal number, since it uses more digits than its factorization.

1399161648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809 (or 5404 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 1399161648 is about 37405.3692402575. The cubic root of 1399161648 is about 1118.4655986582.

Multiplying 1399161648 by its sum of digits (48), we get a square (67159759104 = 259152²).

1399161648 divided by its sum of digits (48) gives a square (29149201 = 5399²).

The spelling of 1399161648 in words is "one billion, three hundred ninety-nine million, one hundred sixty-one thousand, six hundred forty-eight".