4778664 has 64 divisors (see below), whose sum is σ = 13616640. Its totient is φ = 1383360.

The previous prime is 4778663. The next prime is 4778693. The reversal of 4778664 is 4668774.

It is not an unprimeable number, because it can be changed into a prime (4778663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5679 + ... + 6465.

It is an arithmetic number, because the mean of its divisors is an integer number (212760).

Almost surely, 2^4778664 is an apocalyptic number.

4778664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4778664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6808320).

4778664 is an abundant number, since it is smaller than the sum of its proper divisors (8837976).

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

4778664 is a wasteful number, since it uses less digits than its factorization.

4778664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 826 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 4778664 is about 2186.0155534671. The cubic root of 4778664 is about 168.4362246063.

The spelling of 4778664 in words is "four million, seven hundred seventy-eight thousand, six hundred sixty-four".