28620445222 has 4 divisors (see below), whose sum is σ = 42930667836. Its totient is φ = 14310222610.

The previous prime is 28620445201. The next prime is 28620445223. The reversal of 28620445222 is 22254402682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22254402682 = 2 ⋅11127201341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620445223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7155111304 + ... + 7155111307.

It is an arithmetic number, because the mean of its divisors is an integer number (10732666959).

Almost surely, 2^28620445222 is an apocalyptic number.

28620445222 is a deficient number, since it is larger than the sum of its proper divisors (14310222614).

28620445222 is a wasteful number, since it uses less digits than its factorization.

28620445222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14310222613.

The product of its (nonzero) digits is 122880, while the sum is 37.

The spelling of 28620445222 in words is "twenty-eight billion, six hundred twenty million, four hundred forty-five thousand, two hundred twenty-two".