4778940 has 48 divisors (see below), whose sum is σ = 13966848. Its totient is φ = 1218624.

The previous prime is 4778933. The next prime is 4778953. The reversal of 4778940 is 498774.

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 15 ways as a sum of consecutive naturals, for example, 352 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (290976).

Almost surely, 2^4778940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4778940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6983424).

4778940 is an abundant number, since it is smaller than the sum of its proper divisors (9187908).

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

4778940 is a wasteful number, since it uses less digits than its factorization.

4778940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498 (or 3496 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 4778940 is about 2186.0786811092. The cubic root of 4778940 is about 168.4394673190.

It can be divided in two parts, 47 and 78940, that added together give a palindrome (78987).

The spelling of 4778940 in words is "four million, seven hundred seventy-eight thousand, nine hundred forty".