4509864 has 32 divisors (see below), whose sum is σ = 12528000. Its totient is φ = 1503216.

The previous prime is 4509853. The next prime is 4509881. The reversal of 4509864 is 4689054.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10224 + ... + 10655.

It is an arithmetic number, because the mean of its divisors is an integer number (391500).

Almost surely, 2^4509864 is an apocalyptic number.

It is an amenable number.

4509864 is an abundant number, since it is smaller than the sum of its proper divisors (8018136).

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

4509864 is a wasteful number, since it uses less digits than its factorization.

4509864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20894 (or 20884 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 4509864 is about 2123.6440379687. The cubic root of 4509864 is about 165.2169048201.

The spelling of 4509864 in words is "four million, five hundred nine thousand, eight hundred sixty-four".