1381544892 has 72 divisors (see below), whose sum is σ = 4298149856. Its totient is φ = 364362624.

The previous prime is 1381544851. The next prime is 1381544911. The reversal of 1381544892 is 2984451831.

1381544892 is a `hidden beast` number, since 13 + 8 + 1 + 544 + 8 + 92 = 666.

1381544892 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1381544892² = 3817332577222583328, 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 23 ways as a sum of consecutive naturals, for example, 207583 + ... + 214134.

Almost surely, 2^1381544892 is an apocalyptic number.

1381544892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381544892 is an abundant number, since it is smaller than the sum of its proper divisors (2916604964).

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

1381544892 is a wasteful number, since it uses less digits than its factorization.

1381544892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421747 (or 421742 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 1381544892 is about 37169.1389730782. The cubic root of 1381544892 is about 1113.7515817336.

The spelling of 1381544892 in words is "one billion, three hundred eighty-one million, five hundred forty-four thousand, eight hundred ninety-two".