4778685 has 24 divisors (see below), whose sum is σ = 8371584. Its totient is φ = 2521440.

The previous prime is 4778663. The next prime is 4778693. The reversal of 4778685 is 5868774.

It is not a de Polignac number, because 4778685 - 2⁸ = 4778429 is a prime.

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

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 4778685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4120 + ... + 5150.

It is an arithmetic number, because the mean of its divisors is an integer number (348816).

Almost surely, 2^4778685 is an apocalyptic number.

4778685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4778685 is a deficient number, since it is larger than the sum of its proper divisors (3592899).

4778685 is a wasteful number, since it uses less digits than its factorization.

4778685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1142 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 4778685 is about 2186.0203567213. The cubic root of 4778685 is about 168.4364713389.

The spelling of 4778685 in words is "four million, seven hundred seventy-eight thousand, six hundred eighty-five".