28806422 has 8 divisors (see below), whose sum is σ = 43629456. Its totient is φ = 14263272.

The previous prime is 28806397. The next prime is 28806439. The reversal of 28806422 is 22460882.

It is a happy number.

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

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, 69713 + ... + 70124.

It is an arithmetic number, because the mean of its divisors is an integer number (5453682).

Almost surely, 2^28806422 is an apocalyptic number.

28806422 is a deficient number, since it is larger than the sum of its proper divisors (14823034).

28806422 is a wasteful number, since it uses less digits than its factorization.

28806422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139942.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 28806422 is about 5367.1614471711. The cubic root of 28806422 is about 306.5465547789.

The spelling of 28806422 in words is "twenty-eight million, eight hundred six thousand, four hundred twenty-two".