7865536 has 56 divisors (see below), whose sum is σ = 18121376. Its totient is φ = 3317760.

The previous prime is 7865527. The next prime is 7865551. The reversal of 7865536 is 6355687.

It is a tau number, because it is divible by the number of its divisors (56).

It is a d-powerful number, because it can be written as 7⁸ + 8⁷ + 6² + 5³ + 5⁵ + 3⁴ + 6³ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43366 + ... + 43546.

It is an arithmetic number, because the mean of its divisors is an integer number (323596).

Almost surely, 2^7865536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7865536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9060688).

7865536 is an abundant number, since it is smaller than the sum of its proper divisors (10255840).

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

7865536 is a wasteful number, since it uses less digits than its factorization.

7865536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 287 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 7865536 is about 2804.5562928920. The cubic root of 7865536 is about 198.8731294045.

The spelling of 7865536 in words is "seven million, eight hundred sixty-five thousand, five hundred thirty-six".