7820685 has 32 divisors (see below), whose sum is σ = 14640000. Its totient is φ = 3950208.

The previous prime is 7820677. The next prime is 7820693. The reversal of 7820685 is 5860287.

It is an interprime number because it is at equal distance from previous prime (7820677) and next prime (7820693).

It is not a de Polignac number, because 7820685 - 2³ = 7820677 is a prime.

It is a super-2 number, since 2×7820685² = 122326227738450, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041 + ... + 4089.

It is an arithmetic number, because the mean of its divisors is an integer number (457500).

Almost surely, 2^7820685 is an apocalyptic number.

It is an amenable number.

7820685 is a deficient number, since it is larger than the sum of its proper divisors (6819315).

7820685 is a wasteful number, since it uses less digits than its factorization.

7820685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 3076 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 7820685 is about 2796.5487658898. The cubic root of 7820685 is about 198.4944026576.

The spelling of 7820685 in words is "seven million, eight hundred twenty thousand, six hundred eighty-five".