381351956 has 24 divisors (see below), whose sum is σ = 729421056. Its totient is φ = 173669760.

The previous prime is 381351953. The next prime is 381351989. The reversal of 381351956 is 659153183.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381351953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88346 + ... + 92561.

It is an arithmetic number, because the mean of its divisors is an integer number (30392544).

Almost surely, 2^381351956 is an apocalyptic number.

It is an amenable number.

381351956 is a deficient number, since it is larger than the sum of its proper divisors (348069100).

381351956 is a wasteful number, since it uses less digits than its factorization.

381351956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180959 (or 180957 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 381351956 is about 19528.2348408657. The cubic root of 381351956 is about 725.1736126436.

The spelling of 381351956 in words is "three hundred eighty-one million, three hundred fifty-one thousand, nine hundred fifty-six".