28731995 has 8 divisors (see below), whose sum is σ = 34727280. Its totient is φ = 22819680.

The previous prime is 28731977. The next prime is 28732001. The reversal of 28731995 is 59913782.

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

It is not a de Polignac number, because 28731995 - 2⁶ = 28731931 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, 19976 + ... + 21365.

It is an arithmetic number, because the mean of its divisors is an integer number (4340910).

Almost surely, 2^28731995 is an apocalyptic number.

28731995 is a deficient number, since it is larger than the sum of its proper divisors (5995285).

28731995 is a wasteful number, since it uses less digits than its factorization.

28731995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41485.

The product of its digits is 136080, while the sum is 44.

The square root of 28731995 is about 5360.2234095232. The cubic root of 28731995 is about 306.2823195101.

The spelling of 28731995 in words is "twenty-eight million, seven hundred thirty-one thousand, nine hundred ninety-five".