28378222222 has 8 divisors (see below), whose sum is σ = 48648380976. Its totient is φ = 12162095232.

The previous prime is 28378222219. The next prime is 28378222259. The reversal of 28378222222 is 22222287382.

It is a sphenic number, since it is the product of 3 distinct primes.

28378222222 is a modest number, since divided by 222222 gives 28378 as remainder.

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, 1013507923 + ... + 1013507950.

It is an arithmetic number, because the mean of its divisors is an integer number (6081047622).

Almost surely, 2^28378222222 is an apocalyptic number.

28378222222 is a deficient number, since it is larger than the sum of its proper divisors (20270158754).

28378222222 is a wasteful number, since it uses less digits than its factorization.

28378222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027015882.

The product of its digits is 172032, while the sum is 40.

The spelling of 28378222222 in words is "twenty-eight billion, three hundred seventy-eight million, two hundred twenty-two thousand, two hundred twenty-two".