28429778222 has 8 divisors (see below), whose sum is σ = 44498783376. Its totient is φ = 13596850432.

The previous prime is 28429778203. The next prime is 28429778303. The reversal of 28429778222 is 22287792482.

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

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, 309019283 + ... + 309019374.

It is an arithmetic number, because the mean of its divisors is an integer number (5562347922).

Almost surely, 2^28429778222 is an apocalyptic number.

28429778222 is a deficient number, since it is larger than the sum of its proper divisors (16069005154).

28429778222 is a wasteful number, since it uses less digits than its factorization.

28429778222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618038682.

The product of its digits is 3612672, while the sum is 53.

The spelling of 28429778222 in words is "twenty-eight billion, four hundred twenty-nine million, seven hundred seventy-eight thousand, two hundred twenty-two".