1399394560 has 72 divisors (see below), whose sum is σ = 3460214016. Its totient is φ = 541685760.

The previous prime is 1399394483. The next prime is 1399394561. The reversal of 1399394560 is 654939931.

It is not an unprimeable number, because it can be changed into a prime (1399394561) 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, 22047 + ... + 57313.

It is an arithmetic number, because the mean of its divisors is an integer number (48058528).

Almost surely, 2^1399394560 is an apocalyptic number.

1399394560 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 1399394560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730107008).

1399394560 is an abundant number, since it is smaller than the sum of its proper divisors (2060819456).

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

1399394560 is an equidigital number, since it uses as much as digits as its factorization.

1399394560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35319 (or 35305 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 49.

The square root of 1399394560 is about 37408.4824605329. The cubic root of 1399394560 is about 1118.5276571550.

The spelling of 1399394560 in words is "one billion, three hundred ninety-nine million, three hundred ninety-four thousand, five hundred sixty".