28071122 has 4 divisors (see below), whose sum is σ = 42106686. Its totient is φ = 14035560.

The previous prime is 28071119. The next prime is 28071187. The reversal of 28071122 is 22117082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 12397441 = 3959^2 + 3521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7017779 + ... + 7017782.

Almost surely, 2^28071122 is an apocalyptic number.

28071122 is a deficient number, since it is larger than the sum of its proper divisors (14035564).

28071122 is a wasteful number, since it uses less digits than its factorization.

28071122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14035563.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 28071122 is about 5298.2187572806. The cubic root of 28071122 is about 303.9157849021.

The spelling of 28071122 in words is "twenty-eight million, seventy-one thousand, one hundred twenty-two".