28134236 has 36 divisors (see below), whose sum is σ = 54885096. Its totient is φ = 12543840.

The previous prime is 28134217. The next prime is 28134251. The reversal of 28134236 is 63243182.

It is a junction number, because it is equal to n+sod(n) for n = 28134199 and 28134208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49691 + ... + 50253.

It is an arithmetic number, because the mean of its divisors is an integer number (1524586).

Almost surely, 2^28134236 is an apocalyptic number.

28134236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28134236 is a deficient number, since it is larger than the sum of its proper divisors (26750860).

28134236 is a wasteful number, since it uses less digits than its factorization.

28134236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 609 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 28134236 is about 5304.1715658527. The cubic root of 28134236 is about 304.1433851533.

The spelling of 28134236 in words is "twenty-eight million, one hundred thirty-four thousand, two hundred thirty-six".