28969237 has 8 divisors (see below), whose sum is σ = 31642272. Its totient is φ = 26302800.

The previous prime is 28969223. The next prime is 28969267. The reversal of 28969237 is 73296982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28969237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28969267) by changing a digit.

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, 14238 + ... + 16144.

It is an arithmetic number, because the mean of its divisors is an integer number (3955284).

Almost surely, 2^28969237 is an apocalyptic number.

It is an amenable number.

28969237 is a deficient number, since it is larger than the sum of its proper divisors (2673035).

28969237 is a wasteful number, since it uses less digits than its factorization.

28969237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299.

The product of its digits is 326592, while the sum is 46.

The square root of 28969237 is about 5382.3077764097. The cubic root of 28969237 is about 307.1230077157.

The spelling of 28969237 in words is "twenty-eight million, nine hundred sixty-nine thousand, two hundred thirty-seven".