1381219632 has 120 divisors (see below), whose sum is σ = 4297308288. Its totient is φ = 411264000.

The previous prime is 1381219613. The next prime is 1381219633. The reversal of 1381219632 is 2369121831.

1381219632 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 2 + 19 + 632 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1381219633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46132 + ... + 69932.

Almost surely, 2^1381219632 is an apocalyptic number.

1381219632 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 1381219632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148654144).

1381219632 is an abundant number, since it is smaller than the sum of its proper divisors (2916088656).

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

1381219632 is a wasteful number, since it uses less digits than its factorization.

1381219632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23859 (or 23850 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1381219632 is about 37164.7633115025. The cubic root of 1381219632 is about 1113.6641705862.

The spelling of 1381219632 in words is "one billion, three hundred eighty-one million, two hundred nineteen thousand, six hundred thirty-two".