381867826 has 16 divisors (see below), whose sum is σ = 577624320. Its totient is φ = 189331200.

The previous prime is 381867817. The next prime is 381867839. The reversal of 381867826 is 628768183.

It is a self number, because there is not a number n which added to its sum of digits gives 381867826.

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, 313170 + ... + 314386.

It is an arithmetic number, because the mean of its divisors is an integer number (36101520).

Almost surely, 2^381867826 is an apocalyptic number.

381867826 is a deficient number, since it is larger than the sum of its proper divisors (195756494).

381867826 is a wasteful number, since it uses less digits than its factorization.

381867826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its digits is 774144, while the sum is 49.

The square root of 381867826 is about 19541.4386880803. The cubic root of 381867826 is about 725.5004557324.

The spelling of 381867826 in words is "three hundred eighty-one million, eight hundred sixty-seven thousand, eight hundred twenty-six".