28589420 has 24 divisors (see below), whose sum is σ = 60242784. Its totient is φ = 11396736.

The previous prime is 28589417. The next prime is 28589441. The reversal of 28589420 is 2498582.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3977 + ... + 8543.

It is an arithmetic number, because the mean of its divisors is an integer number (2510116).

Almost surely, 2^28589420 is an apocalyptic number.

28589420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28589420 is an abundant number, since it is smaller than the sum of its proper divisors (31653364).

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

28589420 is a wasteful number, since it uses less digits than its factorization.

28589420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889 (or 4887 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28589420 is about 5346.9075174347. The cubic root of 28589420 is about 305.7748639463.

The spelling of 28589420 in words is "twenty-eight million, five hundred eighty-nine thousand, four hundred twenty".