28723265 has 8 divisors (see below), whose sum is σ = 35052480. Its totient is φ = 22588912.

The previous prime is 28723249. The next prime is 28723309. The reversal of 28723265 is 56232782.

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 28723265 - 2⁴ = 28723249 is a prime.

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, 48389 + ... + 48978.

It is an arithmetic number, because the mean of its divisors is an integer number (4381560).

Almost surely, 2^28723265 is an apocalyptic number.

It is an amenable number.

28723265 is a deficient number, since it is larger than the sum of its proper divisors (6329215).

28723265 is an equidigital number, since it uses as much as digits as its factorization.

28723265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97431.

The product of its digits is 40320, while the sum is 35.

The square root of 28723265 is about 5359.4090159270. The cubic root of 28723265 is about 306.2512958435.

The spelling of 28723265 in words is "twenty-eight million, seven hundred twenty-three thousand, two hundred sixty-five".