1390880320 has 112 divisors (see below), whose sum is σ = 3446922240. Its totient is φ = 534104064.

The previous prime is 1390880261. The next prime is 1390880327. The reversal of 1390880320 is 230880931.

It is not an unprimeable number, because it can be changed into a prime (1390880327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934617 + ... + 936103.

Almost surely, 2^1390880320 is an apocalyptic number.

1390880320 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 1390880320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723461120).

1390880320 is an abundant number, since it is smaller than the sum of its proper divisors (2056041920).

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

1390880320 is a wasteful number, since it uses less digits than its factorization.

1390880320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1390880320 is about 37294.5079066610. The cubic root of 1390880320 is about 1116.2545806503.

The spelling of 1390880320 in words is "one billion, three hundred ninety million, eight hundred eighty thousand, three hundred twenty".