84816765 has 72 divisors (see below), whose sum is σ = 166357464. Its totient is φ = 39916800.

The previous prime is 84816763. The next prime is 84816773. The reversal of 84816765 is 56761848.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3059001 + 81757764 = 1749^2 + 9042^2 .

It is not a de Polignac number, because 84816765 - 2¹ = 84816763 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 84816765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84816763) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 201255 + ... + 201675.

Almost surely, 2^84816765 is an apocalyptic number.

It is an amenable number.

84816765 is a deficient number, since it is larger than the sum of its proper divisors (81540699).

84816765 is a wasteful number, since it uses less digits than its factorization.

84816765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 477 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 84816765 is about 9209.6017829220. The cubic root of 84816765 is about 439.3667975310.

The spelling of 84816765 in words is "eighty-four million, eight hundred sixteen thousand, seven hundred sixty-five".