4778684040 has 128 divisors (see below), whose sum is σ = 15534368640. Its totient is φ = 1169012736.

The previous prime is 4778684011. The next prime is 4778684047. The reversal of 4778684040 is 404868774.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4778684047) 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, 244884 + ... + 263676.

It is an arithmetic number, because the mean of its divisors is an integer number (121362255).

Almost surely, 2^4778684040 is an apocalyptic number.

4778684040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4778684040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7767184320).

4778684040 is an abundant number, since it is smaller than the sum of its proper divisors (10755684600).

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

4778684040 is a wasteful number, since it uses less digits than its factorization.

4778684040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18983 (or 18979 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The square root of 4778684040 is about 69128.0264436936. The cubic root of 4778684040 is about 1684.3646005969.

The spelling of 4778684040 in words is "four billion, seven hundred seventy-eight million, six hundred eighty-four thousand, forty".