28834137 has 28 divisors (see below), whose sum is σ = 44441380. Its totient is φ = 18685728.

The previous prime is 28834133. The next prime is 28834139. The reversal of 28834137 is 73143882.

28834137 is a `hidden beast` number, since 288 + 341 + 37 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20331081 + 8503056 = 4509^2 + 2916^2 .

It is not a de Polignac number, because 28834137 - 2² = 28834133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28834133) 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 27 ways as a sum of consecutive naturals, for example, 26439 + ... + 27507.

Almost surely, 2^28834137 is an apocalyptic number.

28834137 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28834137 is a deficient number, since it is larger than the sum of its proper divisors (15607243).

28834137 is an equidigital number, since it uses as much as digits as its factorization.

28834137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1109 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28834137 is about 5369.7427312675. The cubic root of 28834137 is about 306.6448339582.

The spelling of 28834137 in words is "twenty-eight million, eight hundred thirty-four thousand, one hundred thirty-seven".