2278891892 has 12 divisors (see below), whose sum is σ = 4026780576. Its totient is φ = 1128383160.

The previous prime is 2278891883. The next prime is 2278891913. The reversal of 2278891892 is 2981988722.

It is a super-4 number, since 4×2278891892⁴ (a number of 39 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2765234 + ... + 2766057.

It is an arithmetic number, because the mean of its divisors is an integer number (335565048).

Almost surely, 2^2278891892 is an apocalyptic number.

It is an amenable number.

2278891892 is a deficient number, since it is larger than the sum of its proper divisors (1747888684).

2278891892 is a wasteful number, since it uses less digits than its factorization.

2278891892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531398 (or 5531396 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 56.

The square root of 2278891892 is about 47737.7407508985. The cubic root of 2278891892 is about 1315.9556137504.

The spelling of 2278891892 in words is "two billion, two hundred seventy-eight million, eight hundred ninety-one thousand, eight hundred ninety-two".