28570022 has 8 divisors (see below), whose sum is σ = 46151616. Its totient is φ = 13186152.

The previous prime is 28570007. The next prime is 28570039. The reversal of 28570022 is 22007582.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1098847 = 28570022 / (2 + 8 + 5 + 7 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 28569973 and 28570000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549398 + ... + 549449.

It is an arithmetic number, because the mean of its divisors is an integer number (5768952).

Almost surely, 2^28570022 is an apocalyptic number.

28570022 is a deficient number, since it is larger than the sum of its proper divisors (17581594).

28570022 is a wasteful number, since it uses less digits than its factorization.

28570022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098862.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 28570022 is about 5345.0932639197. The cubic root of 28570022 is about 305.7056919378.

It can be divided in two parts, 285 and 70022, that added together give a palindrome (70307).

The spelling of 28570022 in words is "twenty-eight million, five hundred seventy thousand, twenty-two".