1392497856 has 84 divisors (see below), whose sum is σ = 4032653352. Its totient is φ = 459362304.

The previous prime is 1392497839. The next prime is 1392497857. The reversal of 1392497856 is 6587942931.

1392497856 is a `hidden beast` number, since 13 + 92 + 497 + 8 + 56 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1392497857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43411 + ... + 68333.

It is an arithmetic number, because the mean of its divisors is an integer number (48007778).

Almost surely, 2^1392497856 is an apocalyptic number.

1392497856 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 1392497856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2016326676).

1392497856 is an abundant number, since it is smaller than the sum of its proper divisors (2640155496).

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

1392497856 is a wasteful number, since it uses less digits than its factorization.

1392497856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25038 (or 25025 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 1392497856 is about 37316.1875866225. The cubic root of 1392497856 is about 1116.6871322404.

The spelling of 1392497856 in words is "one billion, three hundred ninety-two million, four hundred ninety-seven thousand, eight hundred fifty-six".