1392367988 has 12 divisors (see below), whose sum is σ = 2658157152. Its totient is φ = 632894520.

The previous prime is 1392367987. The next prime is 1392368009. The reversal of 1392367988 is 8897632931.

It is a super-2 number, since 2×1392367988² = 3877377228014336288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392367987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15822320 + ... + 15822407.

It is an arithmetic number, because the mean of its divisors is an integer number (221513096).

Almost surely, 2^1392367988 is an apocalyptic number.

It is an amenable number.

1392367988 is a deficient number, since it is larger than the sum of its proper divisors (1265789164).

1392367988 is a wasteful number, since it uses less digits than its factorization.

1392367988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31644742 (or 31644740 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 1392367988 is about 37314.4474433161. The cubic root of 1392367988 is about 1116.6524161049.

The spelling of 1392367988 in words is "one billion, three hundred ninety-two million, three hundred sixty-seven thousand, nine hundred eighty-eight".