4778540 has 24 divisors (see below), whose sum is σ = 10807440. Its totient is φ = 1764288.

The previous prime is 4778539. The next prime is 4778567. The reversal of 4778540 is 458774.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4778540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8930 + ... + 9449.

It is an arithmetic number, because the mean of its divisors is an integer number (450310).

Almost surely, 2^4778540 is an apocalyptic number.

It is an amenable number.

4778540 is an abundant number, since it is smaller than the sum of its proper divisors (6028900).

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

4778540 is a wasteful number, since it uses less digits than its factorization.

4778540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18401 (or 18399 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 4778540 is about 2185.9871911793. The cubic root of 4778540 is about 168.4347676948.

It can be divided in two parts, 47 and 78540, that added together give a palindrome (78587).

The spelling of 4778540 in words is "four million, seven hundred seventy-eight thousand, five hundred forty".