28706293 has 8 divisors (see below), whose sum is σ = 35789760. Its totient is φ = 22368480.

The previous prime is 28706291. The next prime is 28706303. The reversal of 28706293 is 39260782.

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 28706293 - 2¹ = 28706291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706291) 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, 186328 + ... + 186481.

It is an arithmetic number, because the mean of its divisors is an integer number (4473720).

Almost surely, 2^28706293 is an apocalyptic number.

It is an amenable number.

28706293 is a deficient number, since it is larger than the sum of its proper divisors (7083467).

28706293 is a wasteful number, since it uses less digits than its factorization.

28706293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372827.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28706293 is about 5357.8253984243. The cubic root of 28706293 is about 306.1909647139.

The spelling of 28706293 in words is "twenty-eight million, seven hundred six thousand, two hundred ninety-three".