4778530 has 16 divisors (see below), whose sum is σ = 9107640. Its totient is φ = 1798912.

The previous prime is 4778491. The next prime is 4778539. The reversal of 4778530 is 358774.

It can be written as a sum of positive squares in 4 ways, for example, as 2893401 + 1885129 = 1701^2 + 1373^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4778539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13885 + ... + 14224.

Almost surely, 2^4778530 is an apocalyptic number.

4778530 is a deficient number, since it is larger than the sum of its proper divisors (4329110).

4778530 is a wasteful number, since it uses less digits than its factorization.

4778530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28133.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 4778530 is about 2185.9849038820. The cubic root of 4778530 is about 168.4346502008.

The spelling of 4778530 in words is "four million, seven hundred seventy-eight thousand, five hundred thirty".