1380140352 has 126 divisors (see below), whose sum is σ = 4036698302. Its totient is φ = 450837504.

The previous prime is 1380140339. The next prime is 1380140353. The reversal of 1380140352 is 2530410831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 162409536 + 1217730816 = 12744^2 + 34896^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380140353) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1617558 + ... + 1618410.

Almost surely, 2^1380140352 is an apocalyptic number.

1380140352 is a gapful number since it is divisible by the number (12) 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 1380140352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018349151).

1380140352 is an abundant number, since it is smaller than the sum of its proper divisors (2656557950).

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

1380140352 is an equidigital number, since it uses as much as digits as its factorization.

1380140352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1380140352 is about 37150.2402684020. The cubic root of 1380140352 is about 1113.3740239549.

The spelling of 1380140352 in words is "one billion, three hundred eighty million, one hundred forty thousand, three hundred fifty-two".