28316237 has 8 divisors (see below), whose sum is σ = 30949632. Its totient is φ = 25790400.

The previous prime is 28316219. The next prime is 28316279. The reversal of 28316237 is 73261382.

It is a happy number.

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 28316237 - 2⁶ = 28316173 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 (28316437) 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, 26339 + ... + 27392.

It is an arithmetic number, because the mean of its divisors is an integer number (3868704).

Almost surely, 2^28316237 is an apocalyptic number.

It is an amenable number.

28316237 is a deficient number, since it is larger than the sum of its proper divisors (2633395).

28316237 is a wasteful number, since it uses less digits than its factorization.

28316237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53779.

The product of its digits is 12096, while the sum is 32.

The square root of 28316237 is about 5321.3003110142. The cubic root of 28316237 is about 304.7978127864.

The spelling of 28316237 in words is "twenty-eight million, three hundred sixteen thousand, two hundred thirty-seven".