28572122 has 4 divisors (see below), whose sum is σ = 42858186. Its totient is φ = 14286060.

The previous prime is 28572109. The next prime is 28572139. The reversal of 28572122 is 22127582.

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., 28313041 + 259081 = 5321^2 + 509^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7143029 + ... + 7143032.

Almost surely, 2^28572122 is an apocalyptic number.

28572122 is a deficient number, since it is larger than the sum of its proper divisors (14286064).

28572122 is a wasteful number, since it uses less digits than its factorization.

28572122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286063.

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

The square root of 28572122 is about 5345.2897021583. The cubic root of 28572122 is about 305.7131819125.

The spelling of 28572122 in words is "twenty-eight million, five hundred seventy-two thousand, one hundred twenty-two".