1389157796 has 24 divisors (see below), whose sum is σ = 2624973120. Its totient is φ = 639448992.

The previous prime is 1389157789. The next prime is 1389157801. The reversal of 1389157796 is 6977519831.

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, 15536 + ... + 54951.

It is an arithmetic number, because the mean of its divisors is an integer number (109373880).

Almost surely, 2^1389157796 is an apocalyptic number.

It is an amenable number.

1389157796 is a deficient number, since it is larger than the sum of its proper divisors (1235815324).

1389157796 is a wasteful number, since it uses less digits than its factorization.

1389157796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70883 (or 70881 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 56.

The square root of 1389157796 is about 37271.4072178661. The cubic root of 1389157796 is about 1115.7935849359.

The spelling of 1389157796 in words is "one billion, three hundred eighty-nine million, one hundred fifty-seven thousand, seven hundred ninety-six".