381257232 has 80 divisors (see below), whose sum is σ = 1065146112. Its totient is φ = 117053440.

The previous prime is 381257209. The next prime is 381257243. The reversal of 381257232 is 232752183.

It is a junction number, because it is equal to n+sod(n) for n = 381257193 and 381257202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33382 + ... + 43322.

Almost surely, 2^381257232 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 381257232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532573056).

381257232 is an abundant number, since it is smaller than the sum of its proper divisors (683888880).

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

381257232 is a wasteful number, since it uses less digits than its factorization.

381257232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10016 (or 10010 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 381257232 is about 19525.8093814315. The cubic root of 381257232 is about 725.1135657216.

The spelling of 381257232 in words is "three hundred eighty-one million, two hundred fifty-seven thousand, two hundred thirty-two".