1392395920 has 20 divisors (see below), whose sum is σ = 3237320700. Its totient is φ = 556958336.

The previous prime is 1392395843. The next prime is 1392395933. The reversal of 1392395920 is 295932931.

It can be written as a sum of positive squares in 2 ways, for example, as 593994384 + 798401536 = 24372^2 + 28256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8702395 + ... + 8702554.

It is an arithmetic number, because the mean of its divisors is an integer number (161866035).

Almost surely, 2^1392395920 is an apocalyptic number.

1392395920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1392395920 is an abundant number, since it is smaller than the sum of its proper divisors (1844924780).

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

1392395920 is a wasteful number, since it uses less digits than its factorization.

1392395920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17404962 (or 17404956 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1392395920 is about 37314.8217200619. The cubic root of 1392395920 is about 1116.6598830310.

The spelling of 1392395920 in words is "one billion, three hundred ninety-two million, three hundred ninety-five thousand, nine hundred twenty".