7686990 has 24 divisors (see below), whose sum is σ = 19986408. Its totient is φ = 2049840.

The previous prime is 7686983. The next prime is 7687003. The reversal of 7686990 is 996867.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42616 + ... + 42795.

It is an arithmetic number, because the mean of its divisors is an integer number (832767).

Almost surely, 2^7686990 is an apocalyptic number.

7686990 is an abundant number, since it is smaller than the sum of its proper divisors (12299418).

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

7686990 is a wasteful number, since it uses less digits than its factorization.

7686990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85424 (or 85421 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 7686990 is about 2772.5421547742. The cubic root of 7686990 is about 197.3568048181.

The spelling of 7686990 in words is "seven million, six hundred eighty-six thousand, nine hundred ninety".