381400808 has 16 divisors (see below), whose sum is σ = 739786500. Its totient is φ = 184124416.

The previous prime is 381400807. The next prime is 381400871. The reversal of 381400808 is 808004183.

It can be written as a sum of positive squares in 2 ways, for example, as 372412804 + 8988004 = 19298^2 + 2998^2 .

It is not an unprimeable number, because it can be changed into a prime (381400807) 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, 821753 + ... + 822216.

Almost surely, 2^381400808 is an apocalyptic number.

It is an amenable number.

381400808 is a deficient number, since it is larger than the sum of its proper divisors (358385692).

381400808 is a wasteful number, since it uses less digits than its factorization.

381400808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644004 (or 1644000 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 381400808 is about 19529.4856051049. The cubic root of 381400808 is about 725.2045767509.

The spelling of 381400808 in words is "three hundred eighty-one million, four hundred thousand, eight hundred eight".