8381690 has 8 divisors (see below), whose sum is σ = 15087060. Its totient is φ = 3352672.

The previous prime is 8381669. The next prime is 8381693. The reversal of 8381690 is 961838.

It can be written as a sum of positive squares in 2 ways, for example, as 7038409 + 1343281 = 2653^2 + 1159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8381690² = 140505454512200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8381690.

It is not an unprimeable number, because it can be changed into a prime (8381693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419075 + ... + 419094.

Almost surely, 2^8381690 is an apocalyptic number.

8381690 is a deficient number, since it is larger than the sum of its proper divisors (6705370).

8381690 is a wasteful number, since it uses less digits than its factorization.

8381690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838176.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8381690 is about 2895.1148509170. The cubic root of 8381690 is about 203.1314637785.

The spelling of 8381690 in words is "eight million, three hundred eighty-one thousand, six hundred ninety".