381628851 has 16 divisors (see below), whose sum is σ = 543619200. Its totient is φ = 237428928.

The previous prime is 381628843. The next prime is 381628873. The reversal of 381628851 is 158826183.

It is not a de Polignac number, because 381628851 - 2³ = 381628843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381620851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46146 + ... + 53783.

It is an arithmetic number, because the mean of its divisors is an integer number (33976200).

Almost surely, 2^381628851 is an apocalyptic number.

381628851 is a deficient number, since it is larger than the sum of its proper divisors (161990349).

381628851 is a wasteful number, since it uses less digits than its factorization.

381628851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100018.

The product of its digits is 92160, while the sum is 42.

The square root of 381628851 is about 19535.3231608796. The cubic root of 381628851 is about 725.3490834173.

The spelling of 381628851 in words is "three hundred eighty-one million, six hundred twenty-eight thousand, eight hundred fifty-one".