28731165 has 8 divisors (see below), whose sum is σ = 45969888. Its totient is φ = 15323280.

The previous prime is 28731137. The next prime is 28731179. The reversal of 28731165 is 56113782.

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

It is not a de Polignac number, because 28731165 - 2¹⁷ = 28600093 is a prime.

It is a congruent number.

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, 957691 + ... + 957720.

It is an arithmetic number, because the mean of its divisors is an integer number (5746236).

Almost surely, 2^28731165 is an apocalyptic number.

It is an amenable number.

28731165 is a deficient number, since it is larger than the sum of its proper divisors (17238723).

28731165 is a wasteful number, since it uses less digits than its factorization.

28731165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915419.

The product of its digits is 10080, while the sum is 33.

The square root of 28731165 is about 5360.1459868179. The cubic root of 28731165 is about 306.2793702222.

The spelling of 28731165 in words is "twenty-eight million, seven hundred thirty-one thousand, one hundred sixty-five".