28860869 has 8 divisors (see below), whose sum is σ = 30018912. Its totient is φ = 27725040.

The previous prime is 28860863. The next prime is 28860889. The reversal of 28860869 is 96806882.

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-28860869 is a prime.

It is a super-2 number, since 2×28860869² = 1665899518870322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860863) 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, 2879 + ... + 8124.

It is an arithmetic number, because the mean of its divisors is an integer number (3752364).

Almost surely, 2^28860869 is an apocalyptic number.

It is an amenable number.

28860869 is a deficient number, since it is larger than the sum of its proper divisors (1158043).

28860869 is a wasteful number, since it uses less digits than its factorization.

28860869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11107.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 28860869 is about 5372.2312869049. The cubic root of 28860869 is about 306.7395677084.

The spelling of 28860869 in words is "twenty-eight million, eight hundred sixty thousand, eight hundred sixty-nine".