381251992 has 16 divisors (see below), whose sum is σ = 779833800. Its totient is φ = 173296320.

The previous prime is 381251987. The next prime is 381251993. The reversal of 381251992 is 299152183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381251993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166117 + ... + 2166292.

Almost surely, 2^381251992 is an apocalyptic number.

It is an amenable number.

381251992 is an abundant number, since it is smaller than the sum of its proper divisors (398581808).

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

381251992 is a wasteful number, since it uses less digits than its factorization.

381251992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332426 (or 4332422 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 381251992 is about 19525.6751995930. The cubic root of 381251992 is about 725.1102437190.

The spelling of 381251992 in words is "three hundred eighty-one million, two hundred fifty-one thousand, nine hundred ninety-two".