28946287 has 8 divisors (see below), whose sum is σ = 29791440. Its totient is φ = 28107840.

The previous prime is 28946273. The next prime is 28946303. The reversal of 28946287 is 78264982.

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 28946287 - 2¹⁹ = 28421999 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 (28946207) 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, 7848 + ... + 10930.

It is an arithmetic number, because the mean of its divisors is an integer number (3723930).

Almost surely, 2^28946287 is an apocalyptic number.

28946287 is a deficient number, since it is larger than the sum of its proper divisors (845153).

28946287 is a wasteful number, since it uses less digits than its factorization.

28946287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353.

The product of its digits is 387072, while the sum is 46.

The square root of 28946287 is about 5380.1753688890. The cubic root of 28946287 is about 307.0418833243.

The spelling of 28946287 in words is "twenty-eight million, nine hundred forty-six thousand, two hundred eighty-seven".