1381397232 has 20 divisors (see below), whose sum is σ = 3568609640. Its totient is φ = 460465728.

The previous prime is 1381397219. The next prime is 1381397279. The reversal of 1381397232 is 2327931831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14389507 + ... + 14389602.

It is an arithmetic number, because the mean of its divisors is an integer number (178430482).

Almost surely, 2^1381397232 is an apocalyptic number.

1381397232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381397232 is an abundant number, since it is smaller than the sum of its proper divisors (2187212408).

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

1381397232 is a wasteful number, since it uses less digits than its factorization.

1381397232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28779120 (or 28779114 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 1381397232 is about 37167.1525947307. The cubic root of 1381397232 is about 1113.7119009340.

The spelling of 1381397232 in words is "one billion, three hundred eighty-one million, three hundred ninety-seven thousand, two hundred thirty-two".