1390927380 has 24 divisors (see below), whose sum is σ = 3894596832. Its totient is φ = 370913952.

The previous prime is 1390927379. The next prime is 1390927381. The reversal of 1390927380 is 837290931.

It is an interprime number because it is at equal distance from previous prime (1390927379) and next prime (1390927381).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390927381) 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 7 ways as a sum of consecutive naturals, for example, 11591002 + ... + 11591121.

It is an arithmetic number, because the mean of its divisors is an integer number (162274868).

Almost surely, 2^1390927380 is an apocalyptic number.

1390927380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390927380 is an abundant number, since it is smaller than the sum of its proper divisors (2503669452).

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

1390927380 is a wasteful number, since it uses less digits than its factorization.

1390927380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23182135 (or 23182133 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 1390927380 is about 37295.1388253215. The cubic root of 1390927380 is about 1116.2671698830.

The spelling of 1390927380 in words is "one billion, three hundred ninety million, nine hundred twenty-seven thousand, three hundred eighty".