28013422 has 4 divisors (see below), whose sum is σ = 42020136. Its totient is φ = 14006710.

The previous prime is 28013417. The next prime is 28013423. The reversal of 28013422 is 22431082.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28013393 and 28013402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7003354 + ... + 7003357.

It is an arithmetic number, because the mean of its divisors is an integer number (10505034).

Almost surely, 2^28013422 is an apocalyptic number.

28013422 is a deficient number, since it is larger than the sum of its proper divisors (14006714).

28013422 is a wasteful number, since it uses less digits than its factorization.

28013422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006713.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 28013422 is about 5292.7707299674. The cubic root of 28013422 is about 303.7074097906.

The spelling of 28013422 in words is "twenty-eight million, thirteen thousand, four hundred twenty-two".