2219948778 has 16 divisors (see below), whose sum is σ = 4523669856. Its totient is φ = 726020880.

The previous prime is 2219948777. The next prime is 2219948807. The reversal of 2219948778 is 8778499122.

It is not an unprimeable number, because it can be changed into a prime (2219948777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3490168 + ... + 3490803.

It is an arithmetic number, because the mean of its divisors is an integer number (282729366).

Almost surely, 2^2219948778 is an apocalyptic number.

2219948778 is an abundant number, since it is smaller than the sum of its proper divisors (2303721078).

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

2219948778 is a wasteful number, since it uses less digits than its factorization.

2219948778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6981029.

The product of its digits is 4064256, while the sum is 57.

The square root of 2219948778 is about 47116.3323912208. The cubic root of 2219948778 is about 1304.5107168860.

The spelling of 2219948778 in words is "two billion, two hundred nineteen million, nine hundred forty-eight thousand, seven hundred seventy-eight".