7928685 has 20 divisors (see below), whose sum is σ = 14213628. Its totient is φ = 4228416.

The previous prime is 7928671. The next prime is 7928689. The reversal of 7928685 is 5868297.

It can be written as a sum of positive squares in 2 ways, for example, as 5560164 + 2368521 = 2358^2 + 1539^2 .

It is not a de Polignac number, because 7928685 - 2¹² = 7924589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7928685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928689) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9384 + ... + 10193.

Almost surely, 2^7928685 is an apocalyptic number.

It is an amenable number.

7928685 is a deficient number, since it is larger than the sum of its proper divisors (6284943).

7928685 is a wasteful number, since it uses less digits than its factorization.

7928685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594 (or 19585 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 7928685 is about 2815.7920732895. The cubic root of 7928685 is about 199.4039336225.

The spelling of 7928685 in words is "seven million, nine hundred twenty-eight thousand, six hundred eighty-five".