1390125568 has 80 divisors (see below), whose sum is σ = 3033227736. Its totient is φ = 632586240.

The previous prime is 1390125563. The next prime is 1390125577. The reversal of 1390125568 is 8655210931.

It can be written as a sum of positive squares in 4 ways, for example, as 1041481984 + 348643584 = 32272^2 + 18672^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1390125568.

It is not an unprimeable number, because it can be changed into a prime (1390125563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484458 + ... + 487318.

Almost surely, 2^1390125568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390125568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516613868).

1390125568 is an abundant number, since it is smaller than the sum of its proper divisors (1643102168).

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

1390125568 is an equidigital number, since it uses as much as digits as its factorization.

1390125568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 1390125568 is about 37284.3877246228. The cubic root of 1390125568 is about 1116.0526347310.

The spelling of 1390125568 in words is "one billion, three hundred ninety million, one hundred twenty-five thousand, five hundred sixty-eight".