7986386 has 4 divisors (see below), whose sum is σ = 11979582. Its totient is φ = 3993192.

The previous prime is 7986371. The next prime is 7986389. The reversal of 7986386 is 6836897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4280761 + 3705625 = 2069^2 + 1925^2 .

It is a super-2 number, since 2×7986386² = 127564722681992, 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 7986386.

It is not an unprimeable number, because it can be changed into a prime (7986389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996595 + ... + 1996598.

Almost surely, 2^7986386 is an apocalyptic number.

7986386 is a deficient number, since it is larger than the sum of its proper divisors (3993196).

7986386 is a wasteful number, since it uses less digits than its factorization.

7986386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993195.

The product of its digits is 435456, while the sum is 47.

The square root of 7986386 is about 2826.0194620703. The cubic root of 7986386 is about 199.8864855846.

It can be divided in two parts, 798 and 6386, that multiplied together give a triangular number (5096028 = T₃₁₉₂).

The spelling of 7986386 in words is "seven million, nine hundred eighty-six thousand, three hundred eighty-six".