84864645 has 32 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 45017280.

The previous prime is 84864613. The next prime is 84864653. The reversal of 84864645 is 54646848.

It is not a de Polignac number, because 84864645 - 2⁵ = 84864613 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 84864645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25000 + ... + 28190.

It is an arithmetic number, because the mean of its divisors is an integer number (4740120).

Almost surely, 2^84864645 is an apocalyptic number.

84864645 is the 5319-th octagonal number.

It is an amenable number.

84864645 is a deficient number, since it is larger than the sum of its proper divisors (66819195).

84864645 is a wasteful number, since it uses less digits than its factorization.

84864645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402 (or 3396 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 84864645 is about 9212.2008770977. The cubic root of 84864645 is about 439.4494577810.

84864645 divided by its sum of digits (45) gives a palindrome (1885881).

It can be divided in two parts, 8486 and 4645, that added together give a palindrome (13131).

The spelling of 84864645 in words is "eighty-four million, eight hundred sixty-four thousand, six hundred forty-five".