4787778 has 32 divisors (see below), whose sum is σ = 10293696. Its totient is φ = 1479168.

The previous prime is 4787771. The next prime is 4787779. The reversal of 4787778 is 8777874.

It is not an unprimeable number, because it can be changed into a prime (4787771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7125 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (321678).

Almost surely, 2^4787778 is an apocalyptic number.

4787778 is an abundant number, since it is smaller than the sum of its proper divisors (5505918).

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

4787778 is a wasteful number, since it uses less digits than its factorization.

4787778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its digits is 614656, while the sum is 48.

The square root of 4787778 is about 2188.0991750833. The cubic root of 4787778 is about 168.5432386754.

It can be divided in two parts, 4787 and 778, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 4787778 in words is "four million, seven hundred eighty-seven thousand, seven hundred seventy-eight".