4778717840 has 40 divisors (see below), whose sum is σ = 11965176888. Its totient is φ = 1764449280.

The previous prime is 4778717831. The next prime is 4778717887. The reversal of 4778717840 is 487178774.

It can be written as a sum of positive squares in 4 ways, for example, as 918332416 + 3860385424 = 30304^2 + 62132^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×4778717840² = 45672288388668531200, which contains 22 as substring.

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, 2296421 + ... + 2298500.

Almost surely, 2^4778717840 is an apocalyptic number.

4778717840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4778717840 is an abundant number, since it is smaller than the sum of its proper divisors (7186459048).

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

4778717840 is a wasteful number, since it uses less digits than its factorization.

4778717840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594947 (or 4594941 counting only the distinct ones).

The product of its (nonzero) digits is 2458624, while the sum is 53.

The square root of 4778717840 is about 69128.2709171870. The cubic root of 4778717840 is about 1684.3685718010.

The spelling of 4778717840 in words is "four billion, seven hundred seventy-eight million, seven hundred seventeen thousand, eight hundred forty".