28712965 has 8 divisors (see below), whose sum is σ = 34486560. Its totient is φ = 22949712.

The previous prime is 28712963. The next prime is 28712969. The reversal of 28712965 is 56921782.

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 28712965 - 2¹ = 28712963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28712963) 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, 6322 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (4310820).

Almost surely, 2^28712965 is an apocalyptic number.

It is an amenable number.

28712965 is a deficient number, since it is larger than the sum of its proper divisors (5773595).

28712965 is a wasteful number, since it uses less digits than its factorization.

28712965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171.

The product of its digits is 60480, while the sum is 40.

The square root of 28712965 is about 5358.4480029202. The cubic root of 28712965 is about 306.2146848074.

The spelling of 28712965 in words is "twenty-eight million, seven hundred twelve thousand, nine hundred sixty-five".