396679986 has 48 divisors (see below), whose sum is σ = 913573440. Its totient is φ = 124040160.

The previous prime is 396679979. The next prime is 396679993. The reversal of 396679986 is 689976693.

It is an interprime number because it is at equal distance from previous prime (396679979) and next prime (396679993).

It is a super-2 number, since 2×396679986² = 314710022585920392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29596 + ... + 40856.

It is an arithmetic number, because the mean of its divisors is an integer number (19032780).

Almost surely, 2^396679986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396679986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456786720).

396679986 is an abundant number, since it is smaller than the sum of its proper divisors (516893454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

396679986 is a wasteful number, since it uses less digits than its factorization.

396679986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11391 (or 11388 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 396679986 is about 19916.8267050753. The cubic root of 396679986 is about 734.7621276612.

The spelling of 396679986 in words is "three hundred ninety-six million, six hundred seventy-nine thousand, nine hundred eighty-six".