1380400544 has 24 divisors (see below), whose sum is σ = 2877527268. Its totient is φ = 649600000.

The previous prime is 1380400543. The next prime is 1380400547. The reversal of 1380400544 is 4450040831.

It can be written as a sum of positive squares in 2 ways, for example, as 1184736400 + 195664144 = 34420^2 + 13988^2 .

It is not an unprimeable number, because it can be changed into a prime (1380400543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268207 + ... + 1269294.

Almost surely, 2^1380400544 is an apocalyptic number.

It is an amenable number.

1380400544 is an abundant number, since it is smaller than the sum of its proper divisors (1497126724).

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

1380400544 is a wasteful number, since it uses less digits than its factorization.

1380400544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537528 (or 2537520 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1380400544 is about 37153.7419918909. The cubic root of 1380400544 is about 1113.4439861175.

The spelling of 1380400544 in words is "one billion, three hundred eighty million, four hundred thousand, five hundred forty-four".