28572442 has 8 divisors (see below), whose sum is σ = 42913332. Its totient is φ = 14268000.

The previous prime is 28572437. The next prime is 28572443. The reversal of 28572442 is 24427582.

It can be written as a sum of positive squares in 2 ways, for example, as 28419561 + 152881 = 5331^2 + 391^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28572398 and 28572407.

It is not an unprimeable number, because it can be changed into a prime (28572443) 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, 7059 + ... + 10342.

Almost surely, 2^28572442 is an apocalyptic number.

28572442 is a deficient number, since it is larger than the sum of its proper divisors (14340890).

28572442 is a wasteful number, since it uses less digits than its factorization.

28572442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224.

The product of its digits is 35840, while the sum is 34.

The square root of 28572442 is about 5345.3196349704. The cubic root of 28572442 is about 305.7143232098.

It can be divided in two parts, 285 and 72442, that added together give a palindrome (72727).

The spelling of 28572442 in words is "twenty-eight million, five hundred seventy-two thousand, four hundred forty-two".