381323408 has 20 divisors (see below), whose sum is σ = 754535040. Its totient is φ = 186604704.

The previous prime is 381323399. The next prime is 381323473. The reversal of 381323408 is 804323183.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252788 + ... + 254291.

It is an arithmetic number, because the mean of its divisors is an integer number (37726752).

Almost surely, 2^381323408 is an apocalyptic number.

It is an amenable number.

381323408 is a deficient number, since it is larger than the sum of its proper divisors (373211632).

381323408 is a wasteful number, since it uses less digits than its factorization.

381323408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507134 (or 507128 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 381323408 is about 19527.5038855456. The cubic root of 381323408 is about 725.1555166978.

The spelling of 381323408 in words is "three hundred eighty-one million, three hundred twenty-three thousand, four hundred eight".