28228870 has 16 divisors (see below), whose sum is σ = 53486640. Its totient is φ = 10697184.

The previous prime is 28228867. The next prime is 28228877. The reversal of 28228870 is 7882282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74097 + ... + 74476.

It is an arithmetic number, because the mean of its divisors is an integer number (3342915).

Almost surely, 2^28228870 is an apocalyptic number.

28228870 is a deficient number, since it is larger than the sum of its proper divisors (25257770).

28228870 is a wasteful number, since it uses less digits than its factorization.

28228870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148599.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28228870 is about 5313.0847913430. The cubic root of 28228870 is about 304.4840151480.

The spelling of 28228870 in words is "twenty-eight million, two hundred twenty-eight thousand, eight hundred seventy".