28206422 has 4 divisors (see below), whose sum is σ = 42309636. Its totient is φ = 14103210.

The previous prime is 28206421. The next prime is 28206427. The reversal of 28206422 is 22460282.

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

It is a junction number, because it is equal to n+sod(n) for n = 28206391 and 28206400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7051604 + ... + 7051607.

It is an arithmetic number, because the mean of its divisors is an integer number (10577409).

Almost surely, 2^28206422 is an apocalyptic number.

28206422 is a deficient number, since it is larger than the sum of its proper divisors (14103214).

28206422 is a wasteful number, since it uses less digits than its factorization.

28206422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14103213.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28206422 is about 5310.9718508009. The cubic root of 28206422 is about 304.4032837343.

The spelling of 28206422 in words is "twenty-eight million, two hundred six thousand, four hundred twenty-two".