1381332924 has 18 divisors (see below), whose sum is σ = 3491702760. Its totient is φ = 460444296.

The previous prime is 1381332913. The next prime is 1381332929. The reversal of 1381332924 is 4292331831.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38370359 = 1381332924 / (1 + 3 + 8 + 1 + 3 + 3 + 2 + 9 + 2 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381332929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19185144 + ... + 19185215.

Almost surely, 2^1381332924 is an apocalyptic number.

It is an amenable number.

1381332924 is an abundant number, since it is smaller than the sum of its proper divisors (2110369836).

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

1381332924 is a wasteful number, since it uses less digits than its factorization.

1381332924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38370369 (or 38370364 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1381332924 is about 37166.2874659280. The cubic root of 1381332924 is about 1113.6946185055.

The spelling of 1381332924 in words is "one billion, three hundred eighty-one million, three hundred thirty-two thousand, nine hundred twenty-four".