381309192 has 96 divisors (see below), whose sum is σ = 1142631360. Its totient is φ = 113904000.

The previous prime is 381309179. The next prime is 381309199. The reversal of 381309192 is 291903183.

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

It is not an unprimeable number, because it can be changed into a prime (381309199) 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, 52842 + ... + 59622.

It is an arithmetic number, because the mean of its divisors is an integer number (11902410).

Almost surely, 2^381309192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381309192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571315680).

381309192 is an abundant number, since it is smaller than the sum of its proper divisors (761322168).

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

381309192 is a wasteful number, since it uses less digits than its factorization.

381309192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875 (or 6868 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 381309192 is about 19527.1398827376. The cubic root of 381309192 is about 725.1465051530.

It can be divided in two parts, 3813091 and 92, that added together give a palindrome (3813183).

The spelling of 381309192 in words is "three hundred eighty-one million, three hundred nine thousand, one hundred ninety-two".