28789506 has 40 divisors (see below), whose sum is σ = 65444544. Its totient is φ = 9457560.

The previous prime is 28789493. The next prime is 28789511. The reversal of 28789506 is 60598782.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10251 + ... + 12753.

Almost surely, 2^28789506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28789506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32722272).

28789506 is an abundant number, since it is smaller than the sum of its proper divisors (36655038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28789506 is a wasteful number, since it uses less digits than its factorization.

28789506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588 (or 2579 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28789506 is about 5365.5853361959. The cubic root of 28789506 is about 306.4865385680.

The spelling of 28789506 in words is "twenty-eight million, seven hundred eighty-nine thousand, five hundred six".