1380871812 has 24 divisors (see below), whose sum is σ = 3325971712. Its totient is φ = 445442400.

The previous prime is 1380871777. The next prime is 1380871819. The reversal of 1380871812 is 2181780831.

It is a super-2 number, since 2×1380871812² = 3813613922352326688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1380871819) 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, 1855639 + ... + 1856382.

Almost surely, 2^1380871812 is an apocalyptic number.

1380871812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1380871812 is an abundant number, since it is smaller than the sum of its proper divisors (1945099900).

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

1380871812 is a wasteful number, since it uses less digits than its factorization.

1380871812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712059 (or 3712057 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 1380871812 is about 37160.0835844055. The cubic root of 1380871812 is about 1113.5706814259.

The spelling of 1380871812 in words is "one billion, three hundred eighty million, eight hundred seventy-one thousand, eight hundred twelve".