4778445 has 32 divisors (see below), whose sum is σ = 9255168. Its totient is φ = 2055168.

The previous prime is 4778441. The next prime is 4778453. The reversal of 4778445 is 5448774.

4778445 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4778445 - 2² = 4778441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447 + ... + 3123.

It is an arithmetic number, because the mean of its divisors is an integer number (289224).

Almost surely, 2^4778445 is an apocalyptic number.

4778445 is the 1785-th pentagonal number.

It is an amenable number.

4778445 is a deficient number, since it is larger than the sum of its proper divisors (4476723).

4778445 is a wasteful number, since it uses less digits than its factorization.

4778445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709.

The product of its digits is 125440, while the sum is 39.

The square root of 4778445 is about 2185.9654617583. The cubic root of 4778445 is about 168.4336514955.

The spelling of 4778445 in words is "four million, seven hundred seventy-eight thousand, four hundred forty-five".