1387120866 has 16 divisors (see below), whose sum is σ = 2869905600. Its totient is φ = 446429648.

The previous prime is 1387120849. The next prime is 1387120901. The reversal of 1387120866 is 6680217831.

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, 3985806 + ... + 3986153.

It is an arithmetic number, because the mean of its divisors is an integer number (179369100).

Almost surely, 2^1387120866 is an apocalyptic number.

1387120866 is an abundant number, since it is smaller than the sum of its proper divisors (1482784734).

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

1387120866 is a wasteful number, since it uses less digits than its factorization.

1387120866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971993.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1387120866 is about 37244.0715550811. The cubic root of 1387120866 is about 1115.2479533287.

The spelling of 1387120866 in words is "one billion, three hundred eighty-seven million, one hundred twenty thousand, eight hundred sixty-six".