7865040 has 40 divisors (see below), whose sum is σ = 24382368. Its totient is φ = 2097280.

The previous prime is 7865023. The next prime is 7865047. The reversal of 7865040 is 405687.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7864989 and 7865007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7865047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16146 + ... + 16625.

Almost surely, 2^7865040 is an apocalyptic number.

It is an amenable number.

7865040 is an abundant number, since it is smaller than the sum of its proper divisors (16517328).

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

7865040 is a wasteful number, since it uses less digits than its factorization.

7865040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32787 (or 32781 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 7865040 is about 2804.4678639628. The cubic root of 7865040 is about 198.8689490093.

The spelling of 7865040 in words is "seven million, eight hundred sixty-five thousand, forty".