7540686 has 12 divisors (see below), whose sum is σ = 16338192. Its totient is φ = 2513556.

The previous prime is 7540661. The next prime is 7540691. The reversal of 7540686 is 6860457.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7540686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209446 + ... + 209481.

It is an arithmetic number, because the mean of its divisors is an integer number (1361516).

Almost surely, 2^7540686 is an apocalyptic number.

7540686 is an abundant number, since it is smaller than the sum of its proper divisors (8797506).

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

7540686 is a wasteful number, since it uses less digits than its factorization.

7540686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418935 (or 418932 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 7540686 is about 2746.0309539406. The cubic root of 7540686 is about 196.0967001662.

The spelling of 7540686 in words is "seven million, five hundred forty thousand, six hundred eighty-six".