28572322 has 4 divisors (see below), whose sum is σ = 42858486. Its totient is φ = 14286160.

The previous prime is 28572307. The next prime is 28572347. The reversal of 28572322 is 22327582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22327582 = 2 ⋅11163791.

It can be written as a sum of positive squares in only one way, i.e., 27342441 + 1229881 = 5229^2 + 1109^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7143079 + ... + 7143082.

Almost surely, 2^28572322 is an apocalyptic number.

28572322 is a deficient number, since it is larger than the sum of its proper divisors (14286164).

28572322 is a wasteful number, since it uses less digits than its factorization.

28572322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286163.

The product of its digits is 13440, while the sum is 31.

The square root of 28572322 is about 5345.3084101855. The cubic root of 28572322 is about 305.7138952243.

The spelling of 28572322 in words is "twenty-eight million, five hundred seventy-two thousand, three hundred twenty-two".