1380239860 has 48 divisors (see below), whose sum is σ = 3151978704. Its totient is φ = 505571328.

The previous prime is 1380239849. The next prime is 1380239881. The reversal of 1380239860 is 689320831.

It can be written as a sum of positive squares in 8 ways, for example, as 158457744 + 1221782116 = 12588^2 + 34954^2 .

It is a super-2 number, since 2×1380239860² = 3810124142265639200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42279 + ... + 67438.

It is an arithmetic number, because the mean of its divisors is an integer number (65666223).

Almost surely, 2^1380239860 is an apocalyptic number.

1380239860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1380239860 is an abundant number, since it is smaller than the sum of its proper divisors (1771738844).

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

1380239860 is a wasteful number, since it uses less digits than its factorization.

1380239860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109780 (or 109778 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1380239860 is about 37151.5795088177. The cubic root of 1380239860 is about 1113.4007813688.

The spelling of 1380239860 in words is "one billion, three hundred eighty million, two hundred thirty-nine thousand, eight hundred sixty".