28061867 has 8 divisors (see below), whose sum is σ = 28740096. Its totient is φ = 27387112.

The previous prime is 28061833. The next prime is 28061881. The reversal of 28061867 is 76816082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28061867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28061867.

It is not an unprimeable number, because it can be changed into a prime (28061807) 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, 23048 + ... + 24234.

It is an arithmetic number, because the mean of its divisors is an integer number (3592512).

Almost surely, 2^28061867 is an apocalyptic number.

28061867 is a deficient number, since it is larger than the sum of its proper divisors (678229).

28061867 is a wasteful number, since it uses less digits than its factorization.

28061867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28061867 is about 5297.3452785334. The cubic root of 28061867 is about 303.8823810625.

The spelling of 28061867 in words is "twenty-eight million, sixty-one thousand, eight hundred sixty-seven".