4781664 has 36 divisors (see below), whose sum is σ = 13598676. Its totient is φ = 1593792.

The previous prime is 4781663. The next prime is 4781669. The reversal of 4781664 is 4661874.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8014 + ... + 8589.

It is an arithmetic number, because the mean of its divisors is an integer number (377741).

Almost surely, 2^4781664 is an apocalyptic number.

It is an amenable number.

4781664 is an abundant number, since it is smaller than the sum of its proper divisors (8817012).

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

4781664 is a wasteful number, since it uses less digits than its factorization.

4781664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16619 (or 16608 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 4781664 is about 2186.7016257368. The cubic root of 4781664 is about 168.4714647884.

It can be divided in two parts, 4781 and 664, that added together give a palindrome (5445).

The spelling of 4781664 in words is "four million, seven hundred eighty-one thousand, six hundred sixty-four".