28097836 has 12 divisors (see below), whose sum is σ = 52953712. Its totient is φ = 12968208.

The previous prime is 28097813. The next prime is 28097921. The reversal of 28097836 is 63879082.

It is a junction number, because it is equal to n+sod(n) for n = 28097792 and 28097801.

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, 270120 + ... + 270223.

Almost surely, 2^28097836 is an apocalyptic number.

28097836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28097836 is a deficient number, since it is larger than the sum of its proper divisors (24855876).

28097836 is a wasteful number, since it uses less digits than its factorization.

28097836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540360 (or 540358 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28097836 is about 5300.7391937352. The cubic root of 28097836 is about 304.0121619096.

The spelling of 28097836 in words is "twenty-eight million, ninety-seven thousand, eight hundred thirty-six".