1392739920 has 560 divisors, whose sum is σ = 5737882752. Its totient is φ = 309795840.

The previous prime is 1392739913. The next prime is 1392739937. The reversal of 1392739920 is 299372931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 8339677 + ... + 8339843.

Almost surely, 2^1392739920 is an apocalyptic number.

1392739920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392739920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2868941376).

1392739920 is an abundant number, since it is smaller than the sum of its proper divisors (4345142832).

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

1392739920 is a wasteful number, since it uses less digits than its factorization.

1392739920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 1392739920 is about 37319.4308638275. The cubic root of 1392739920 is about 1116.7518346961.

The spelling of 1392739920 in words is "one billion, three hundred ninety-two million, seven hundred thirty-nine thousand, nine hundred twenty".