1390647260 has 24 divisors (see below), whose sum is σ = 3092145840. Its totient is φ = 523537664.

The previous prime is 1390647253. The next prime is 1390647283. The reversal of 1390647260 is 627460931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044730 + ... + 2045409.

It is an arithmetic number, because the mean of its divisors is an integer number (128839410).

Almost surely, 2^1390647260 is an apocalyptic number.

1390647260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390647260 is an abundant number, since it is smaller than the sum of its proper divisors (1701498580).

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

1390647260 is a wasteful number, since it uses less digits than its factorization.

1390647260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090165 (or 4090163 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 1390647260 is about 37291.3831870045. The cubic root of 1390647260 is about 1116.1922295333.

The spelling of 1390647260 in words is "one billion, three hundred ninety million, six hundred forty-seven thousand, two hundred sixty".