1392931668 has 48 divisors (see below), whose sum is σ = 3328222464. Its totient is φ = 453214080.

The previous prime is 1392931651. The next prime is 1392931691. The reversal of 1392931668 is 8661392931.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220798 + ... + 227018.

It is an arithmetic number, because the mean of its divisors is an integer number (69337968).

Almost surely, 2^1392931668 is an apocalyptic number.

It is an amenable number.

1392931668 is an abundant number, since it is smaller than the sum of its proper divisors (1935290796).

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

1392931668 is a wasteful number, since it uses less digits than its factorization.

1392931668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672 (or 6670 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 1392931668 is about 37321.9997856492. Note that the first 3 decimals coincide. The cubic root of 1392931668 is about 1116.8030826239.

The spelling of 1392931668 in words is "one billion, three hundred ninety-two million, nine hundred thirty-one thousand, six hundred sixty-eight".