28867829 has 4 divisors (see below), whose sum is σ = 30122976. Its totient is φ = 27612684.

The previous prime is 28867801. The next prime is 28867831. The reversal of 28867829 is 92876882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28867829 - 2¹² = 28863733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28867849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627539 + ... + 627584.

It is an arithmetic number, because the mean of its divisors is an integer number (7530744).

Almost surely, 2^28867829 is an apocalyptic number.

It is an amenable number.

28867829 is a deficient number, since it is larger than the sum of its proper divisors (1255147).

28867829 is a wasteful number, since it uses less digits than its factorization.

28867829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255146.

The product of its digits is 774144, while the sum is 50.

The square root of 28867829 is about 5372.8790233915. The cubic root of 28867829 is about 306.7642231892.

The spelling of 28867829 in words is "twenty-eight million, eight hundred sixty-seven thousand, eight hundred twenty-nine".