28830140 has 24 divisors (see below), whose sum is σ = 60712512. Its totient is φ = 11499840.

The previous prime is 28830121. The next prime is 28830149. The reversal of 28830140 is 4103882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28830149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 9755.

It is an arithmetic number, because the mean of its divisors is an integer number (2529688).

Almost surely, 2^28830140 is an apocalyptic number.

28830140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28830140 is an abundant number, since it is smaller than the sum of its proper divisors (31882372).

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

28830140 is a wasteful number, since it uses less digits than its factorization.

28830140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037 (or 4035 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28830140 is about 5369.3705403893. The cubic root of 28830140 is about 306.6306642255.

The spelling of 28830140 in words is "twenty-eight million, eight hundred thirty thousand, one hundred forty".