381906234 has 24 divisors (see below), whose sum is σ = 843078132. Its totient is φ = 124899840.

The previous prime is 381906167. The next prime is 381906247. The reversal of 381906234 is 432609183.

It can be written as a sum of positive squares in 2 ways, for example, as 379665225 + 2241009 = 19485^2 + 1497^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199207 + ... + 201114.

Almost surely, 2^381906234 is an apocalyptic number.

381906234 is an abundant number, since it is smaller than the sum of its proper divisors (461171898).

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

381906234 is a wasteful number, since it uses less digits than its factorization.

381906234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400382 (or 400379 counting only the distinct ones).

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

The square root of 381906234 is about 19542.4213955180. The cubic root of 381906234 is about 725.5247783605.

The spelling of 381906234 in words is "three hundred eighty-one million, nine hundred six thousand, two hundred thirty-four".