28834840 has 32 divisors (see below), whose sum is σ = 66635280. Its totient is φ = 11221632.

The previous prime is 28834831. The next prime is 28834853. The reversal of 28834840 is 4843882.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 28834840.

It is a congruent number.

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, 8262 + ... + 11221.

Almost surely, 2^28834840 is an apocalyptic number.

28834840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28834840 is an abundant number, since it is smaller than the sum of its proper divisors (37800440).

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

28834840 is a wasteful number, since it uses less digits than its factorization.

28834840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19531 (or 19527 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 28834840 is about 5369.8081902429. The cubic root of 28834840 is about 306.6473260224.

The spelling of 28834840 in words is "twenty-eight million, eight hundred thirty-four thousand, eight hundred forty".