28213336 has 24 divisors (see below), whose sum is σ = 56199420. Its totient is φ = 13275776.

The previous prime is 28213327. The next prime is 28213337. The reversal of 28213336 is 63331282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3790 + ... + 8413.

Almost surely, 2^28213336 is an apocalyptic number.

It is an amenable number.

28213336 is a deficient number, since it is larger than the sum of its proper divisors (27986084).

28213336 is a wasteful number, since it uses less digits than its factorization.

28213336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12243 (or 12222 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 28213336 is about 5311.6227275664. The cubic root of 28213336 is about 304.4281536305.

The spelling of 28213336 in words is "twenty-eight million, two hundred thirteen thousand, three hundred thirty-six".