28936237 has 8 divisors (see below), whose sum is σ = 32585472. Its totient is φ = 25456800.

The previous prime is 28936223. The next prime is 28936241. The reversal of 28936237 is 73263982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28936237 - 2¹¹ = 28934189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28936237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42088 + ... + 42769.

It is an arithmetic number, because the mean of its divisors is an integer number (4073184).

Almost surely, 2^28936237 is an apocalyptic number.

It is an amenable number.

28936237 is a deficient number, since it is larger than the sum of its proper divisors (3649235).

28936237 is a wasteful number, since it uses less digits than its factorization.

28936237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84899.

The product of its digits is 108864, while the sum is 40.

The square root of 28936237 is about 5379.2413033810. The cubic root of 28936237 is about 307.0063447638.

The spelling of 28936237 in words is "twenty-eight million, nine hundred thirty-six thousand, two hundred thirty-seven".