1392288669 has 28 divisors (see below), whose sum is σ = 2197367200. Its totient is φ = 879331464.

The previous prime is 1392288659. The next prime is 1392288673. The reversal of 1392288669 is 9668822931.

It is a de Polignac number, because none of the positive numbers 2^k-1392288669 is a prime.

It is a super-2 number, since 2×1392288669² = 3876935475651583122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392288659) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 36409 + ... + 64110.

It is an arithmetic number, because the mean of its divisors is an integer number (78477400).

Almost surely, 2^1392288669 is an apocalyptic number.

1392288669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1392288669 is a deficient number, since it is larger than the sum of its proper divisors (805078531).

1392288669 is an equidigital number, since it uses as much as digits as its factorization.

1392288669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100556 (or 100541 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1392288669 is about 37313.3845824792. The cubic root of 1392288669 is about 1116.6312115967.

The spelling of 1392288669 in words is "one billion, three hundred ninety-two million, two hundred eighty-eight thousand, six hundred sixty-nine".