4220940778 has 16 divisors (see below), whose sum is σ = 6935015880. Its totient is φ = 1917830656.

The previous prime is 4220940709. The next prime is 4220940781. The reversal of 4220940778 is 8770490224.

It can be written as a sum of positive squares in 4 ways, for example, as 3807753849 + 413186929 = 61707^2 + 20327^2 .

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, 2139451 + ... + 2141422.

Almost surely, 2^4220940778 is an apocalyptic number.

4220940778 is a deficient number, since it is larger than the sum of its proper divisors (2714075102).

4220940778 is a wasteful number, since it uses less digits than its factorization.

4220940778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280921.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 4220940778 is about 64968.7677118783. The cubic root of 4220940778 is about 1616.1056661966.

The spelling of 4220940778 in words is "four billion, two hundred twenty million, nine hundred forty thousand, seven hundred seventy-eight".