28601287 has 8 divisors (see below), whose sum is σ = 33601680. Its totient is φ = 24000960.

The previous prime is 28601269. The next prime is 28601297. The reversal of 28601287 is 78210682.

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 28601287 - 2¹¹ = 28599239 is a prime.

It is a Duffinian number.

28601287 is a modest number, since divided by 1287 gives 286 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28601227) 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, 99862 + ... + 100147.

It is an arithmetic number, because the mean of its divisors is an integer number (4200210).

Almost surely, 2^28601287 is an apocalyptic number.

28601287 is a deficient number, since it is larger than the sum of its proper divisors (5000393).

28601287 is a wasteful number, since it uses less digits than its factorization.

28601287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200033.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28601287 is about 5348.0171091723. The cubic root of 28601287 is about 305.8171654733.

The spelling of 28601287 in words is "twenty-eight million, six hundred one thousand, two hundred eighty-seven".