1392857856 has 180 divisors, whose sum is σ = 4473596512. Its totient is φ = 428488704.

The previous prime is 1392857839. The next prime is 1392857857. The reversal of 1392857856 is 6587582931.

1392857856 is a `hidden beast` number, since 13 + 9 + 2 + 8 + 578 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1392857857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 266985 + ... + 272151.

Almost surely, 2^1392857856 is an apocalyptic number.

1392857856 is a gapful number since it is divisible by the number (16) 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 1392857856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236798256).

1392857856 is an abundant number, since it is smaller than the sum of its proper divisors (3080738656).

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

1392857856 is an equidigital number, since it uses as much as digits as its factorization.

1392857856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208 (or 5185 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 1392857856 is about 37321.0109187841. The cubic root of 1392857856 is about 1116.7833556631.

The spelling of 1392857856 in words is "one billion, three hundred ninety-two million, eight hundred fifty-seven thousand, eight hundred fifty-six".