4188212778 has 32 divisors (see below), whose sum is σ = 8654764032. Its totient is φ = 1349766000.

The previous prime is 4188212719. The next prime is 4188212783. The reversal of 4188212778 is 8772128814.

4188212778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4188212778² = 35082252547604954568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198853 + ... + 218903.

It is an arithmetic number, because the mean of its divisors is an integer number (270461376).

Almost surely, 2^4188212778 is an apocalyptic number.

4188212778 is an abundant number, since it is smaller than the sum of its proper divisors (4466551254).

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

4188212778 is a wasteful number, since it uses less digits than its factorization.

4188212778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210.

The product of its digits is 401408, while the sum is 48.

The square root of 4188212778 is about 64716.4026966889. The cubic root of 4188212778 is about 1611.9178793185.

The spelling of 4188212778 in words is "four billion, one hundred eighty-eight million, two hundred twelve thousand, seven hundred seventy-eight".