28340936 has 32 divisors (see below), whose sum is σ = 58026360. Its totient is φ = 12897792.

The previous prime is 28340929. The next prime is 28340959. The reversal of 28340936 is 63904382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21104836 + 7236100 = 4594^2 + 2690^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28340896 and 28340905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5726 + ... + 9458.

Almost surely, 2^28340936 is an apocalyptic number.

28340936 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28340936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29013180).

28340936 is an abundant number, since it is smaller than the sum of its proper divisors (29685424).

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

28340936 is a wasteful number, since it uses less digits than its factorization.

28340936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3821 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28340936 is about 5323.6205725051. The cubic root of 28340936 is about 304.8864075786.

The spelling of 28340936 in words is "twenty-eight million, three hundred forty thousand, nine hundred thirty-six".