28589428 has 48 divisors (see below), whose sum is σ = 59076864. Its totient is φ = 11854080.

The previous prime is 28589417. The next prime is 28589441. The reversal of 28589428 is 82498582.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145026 + ... + 145222.

It is an arithmetic number, because the mean of its divisors is an integer number (1230768).

Almost surely, 2^28589428 is an apocalyptic number.

28589428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28589428 is an abundant number, since it is smaller than the sum of its proper divisors (30487436).

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

28589428 is a wasteful number, since it uses less digits than its factorization.

28589428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 350 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 28589428 is about 5346.9082655307. The cubic root of 28589428 is about 305.7748924674.

The spelling of 28589428 in words is "twenty-eight million, five hundred eighty-nine thousand, four hundred twenty-eight".