28935820 has 12 divisors (see below), whose sum is σ = 60765264. Its totient is φ = 11574320.

The previous prime is 28935799. The next prime is 28935839. The reversal of 28935820 is 2853982.

It is a self number, because there is not a number n which added to its sum of digits gives 28935820.

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, 723376 + ... + 723415.

It is an arithmetic number, because the mean of its divisors is an integer number (5063772).

Almost surely, 2^28935820 is an apocalyptic number.

28935820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28935820 is an abundant number, since it is smaller than the sum of its proper divisors (31829444).

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

28935820 is a wasteful number, since it uses less digits than its factorization.

28935820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446800 (or 1446798 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28935820 is about 5379.2025431285. The cubic root of 28935820 is about 307.0048700009.

The spelling of 28935820 in words is "twenty-eight million, nine hundred thirty-five thousand, eight hundred twenty".