381381424 has 10 divisors (see below), whose sum is σ = 738926540. Its totient is φ = 190690704.

The previous prime is 381381401. The next prime is 381381461. The reversal of 381381424 is 424183183.

It is a self number, because there is not a number n which added to its sum of digits gives 381381424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11918154 + ... + 11918185.

It is an arithmetic number, because the mean of its divisors is an integer number (73892654).

Almost surely, 2^381381424 is an apocalyptic number.

It is an amenable number.

381381424 is a deficient number, since it is larger than the sum of its proper divisors (357545116).

381381424 is a wasteful number, since it uses less digits than its factorization.

381381424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23836347 (or 23836341 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 381381424 is about 19528.9893235672. The cubic root of 381381424 is about 725.1922908097.

The spelling of 381381424 in words is "three hundred eighty-one million, three hundred eighty-one thousand, four hundred twenty-four".