381436100 has 18 divisors (see below), whose sum is σ = 827716554. Its totient is φ = 152574400.

The previous prime is 381436093. The next prime is 381436147. The reversal of 381436100 is 1634183.

It can be written as a sum of positive squares in 3 ways, for example, as 3444736 + 377991364 = 1856^2 + 19442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 381436100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1907081 + ... + 1907280.

It is an arithmetic number, because the mean of its divisors is an integer number (45984253).

Almost surely, 2^381436100 is an apocalyptic number.

It is an amenable number.

381436100 is an abundant number, since it is smaller than the sum of its proper divisors (446280454).

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

381436100 is a wasteful number, since it uses less digits than its factorization.

381436100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814375 (or 3814368 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 381436100 is about 19530.3891410284. The cubic root of 381436100 is about 725.2269444107.

The spelling of 381436100 in words is "three hundred eighty-one million, four hundred thirty-six thousand, one hundred".