28707235 has 8 divisors (see below), whose sum is σ = 34510896. Its totient is φ = 22924320.

The previous prime is 28707229. The next prime is 28707251. The reversal of 28707235 is 53270782.

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

It is not a de Polignac number, because 28707235 - 2¹⁵ = 28674467 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 28707235.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956 + ... + 7825.

It is an arithmetic number, because the mean of its divisors is an integer number (4313862).

Almost surely, 2^28707235 is an apocalyptic number.

28707235 is a deficient number, since it is larger than the sum of its proper divisors (5803661).

28707235 is an equidigital number, since it uses as much as digits as its factorization.

28707235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28707235 is about 5357.9133065028. The cubic root of 28707235 is about 306.1943139067.

The spelling of 28707235 in words is "twenty-eight million, seven hundred seven thousand, two hundred thirty-five".