381381705 has 48 divisors (see below), whose sum is σ = 674593920. Its totient is φ = 199286784.

The previous prime is 381381701. The next prime is 381381727. The reversal of 381381705 is 507183183.

It is not a de Polignac number, because 381381705 - 2² = 381381701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381381705.

It is not an unprimeable number, because it can be changed into a prime (381381701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 495561 + ... + 496329.

It is an arithmetic number, because the mean of its divisors is an integer number (14054040).

Almost surely, 2^381381705 is an apocalyptic number.

It is an amenable number.

381381705 is a deficient number, since it is larger than the sum of its proper divisors (293212215).

381381705 is a wasteful number, since it uses less digits than its factorization.

381381705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 381381705 is about 19528.9965179986. The cubic root of 381381705 is about 725.1924689158.

The spelling of 381381705 in words is "three hundred eighty-one million, three hundred eighty-one thousand, seven hundred five".