28571222 has 8 divisors (see below), whose sum is σ = 43583400. Its totient is φ = 14043424.

The previous prime is 28571201. The next prime is 28571227. The reversal of 28571222 is 22217582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120947 + ... + 121182.

It is an arithmetic number, because the mean of its divisors is an integer number (5447925).

Almost surely, 2^28571222 is an apocalyptic number.

28571222 is a deficient number, since it is larger than the sum of its proper divisors (15012178).

28571222 is a wasteful number, since it uses less digits than its factorization.

28571222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242190.

The product of its digits is 4480, while the sum is 29.

The square root of 28571222 is about 5345.2055152258. The cubic root of 28571222 is about 305.7099719683.

The spelling of 28571222 in words is "twenty-eight million, five hundred seventy-one thousand, two hundred twenty-two".