381065638 has 16 divisors (see below), whose sum is σ = 579560256. Its totient is φ = 187897320.

The previous prime is 381065623. The next prime is 381065651. The reversal of 381065638 is 836560183.

It is a super-2 number, since 2×381065638² = 290422040928694088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381065638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38245 + ... + 47167.

It is an arithmetic number, because the mean of its divisors is an integer number (36222516).

Almost surely, 2^381065638 is an apocalyptic number.

381065638 is a deficient number, since it is larger than the sum of its proper divisors (198494618).

381065638 is a wasteful number, since it uses less digits than its factorization.

381065638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 381065638 is about 19520.9025918373. The cubic root of 381065638 is about 724.9920810867.

The spelling of 381065638 in words is "three hundred eighty-one million, sixty-five thousand, six hundred thirty-eight".