28286943 has 8 divisors (see below), whose sum is σ = 37782528. Its totient is φ = 18824664.

The previous prime is 28286939. The next prime is 28286957. The reversal of 28286943 is 34968282.

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

It is not a de Polignac number, because 28286943 - 2² = 28286939 is a prime.

It is a super-2 number, since 2×28286943² = 1600302288570498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28286895 and 28286904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28286933) 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, 6271 + ... + 9792.

It is an arithmetic number, because the mean of its divisors is an integer number (4722816).

Almost surely, 2^28286943 is an apocalyptic number.

28286943 is a deficient number, since it is larger than the sum of its proper divisors (9495585).

28286943 is a wasteful number, since it uses less digits than its factorization.

28286943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16653.

The product of its digits is 165888, while the sum is 42.

The square root of 28286943 is about 5318.5470760350. The cubic root of 28286943 is about 304.6926690142.

The spelling of 28286943 in words is "twenty-eight million, two hundred eighty-six thousand, nine hundred forty-three".