671862386 has 8 divisors (see below), whose sum is σ = 1085316204. Its totient is φ = 310090320.

The previous prime is 671862379. The next prime is 671862431. The reversal of 671862386 is 683268176.

It can be written as a sum of positive squares in 2 ways, for example, as 465221761 + 206640625 = 21569^2 + 14375^2 .

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

It is a super-2 number, since 2×671862386² = 902798131443225992, 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 671862386.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12920405 + ... + 12920456.

Almost surely, 2^671862386 is an apocalyptic number.

671862386 is a deficient number, since it is larger than the sum of its proper divisors (413453818).

671862386 is a wasteful number, since it uses less digits than its factorization.

671862386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25840876.

The product of its digits is 580608, while the sum is 47.

The square root of 671862386 is about 25920.3083700792. The cubic root of 671862386 is about 875.8440339011.

The spelling of 671862386 in words is "six hundred seventy-one million, eight hundred sixty-two thousand, three hundred eighty-six".