28868429 has 4 divisors (see below), whose sum is σ = 30387840. Its totient is φ = 27349020.

The previous prime is 28868423. The next prime is 28868459. The reversal of 28868429 is 92486882.

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 28868429 - 2⁸ = 28868173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28868423) 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, 759677 + ... + 759714.

It is an arithmetic number, because the mean of its divisors is an integer number (7596960).

Almost surely, 2^28868429 is an apocalyptic number.

It is an amenable number.

28868429 is a deficient number, since it is larger than the sum of its proper divisors (1519411).

28868429 is a wasteful number, since it uses less digits than its factorization.

28868429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519410.

The product of its digits is 442368, while the sum is 47.

The square root of 28868429 is about 5372.9348590877. The cubic root of 28868429 is about 306.7663484761.

The spelling of 28868429 in words is "twenty-eight million, eight hundred sixty-eight thousand, four hundred twenty-nine".