1389642366 has 32 divisors (see below), whose sum is σ = 3177543168. Its totient is φ = 396888480.

The previous prime is 1389642361. The next prime is 1389642383. The reversal of 1389642366 is 6632469831.

It is a super-2 number, since 2×1389642366² = 3862211810764155912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389642361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149676 + ... + 158688.

It is an arithmetic number, because the mean of its divisors is an integer number (99298224).

Almost surely, 2^1389642366 is an apocalyptic number.

1389642366 is an abundant number, since it is smaller than the sum of its proper divisors (1787900802).

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

1389642366 is a wasteful number, since it uses less digits than its factorization.

1389642366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696.

The product of its digits is 1119744, while the sum is 48.

The square root of 1389642366 is about 37277.9072105718. The cubic root of 1389642366 is about 1115.9233079581.

The spelling of 1389642366 in words is "one billion, three hundred eighty-nine million, six hundred forty-two thousand, three hundred sixty-six".