4778240 has 36 divisors (see below), whose sum is σ = 11448444. Its totient is φ = 1910784.

The previous prime is 4778237. The next prime is 4778303. The reversal of 4778240 is 428774.

It can be written as a sum of positive squares in 2 ways, for example, as 2166784 + 2611456 = 1472^2 + 1616^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 4778197 and 4778206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 3146.

Almost surely, 2^4778240 is an apocalyptic number.

4778240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4778240 is an abundant number, since it is smaller than the sum of its proper divisors (6670204).

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

4778240 is an equidigital number, since it uses as much as digits as its factorization.

4778240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 4778240 is about 2185.9185712190. The cubic root of 4778240 is about 168.4312428045.

It can be divided in two parts, 47 and 78240, that added together give a palindrome (78287).

The spelling of 4778240 in words is "four million, seven hundred seventy-eight thousand, two hundred forty".