28834857 has 12 divisors (see below), whose sum is σ = 42272880. Its totient is φ = 18935928.

The previous prime is 28834853. The next prime is 28834859. The reversal of 28834857 is 75843882.

It is not a de Polignac number, because 28834857 - 2² = 28834853 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28834853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23307 + ... + 24512.

It is an arithmetic number, because the mean of its divisors is an integer number (3522740).

Almost surely, 2^28834857 is an apocalyptic number.

It is an amenable number.

28834857 is a deficient number, since it is larger than the sum of its proper divisors (13438023).

28834857 is a wasteful number, since it uses less digits than its factorization.

28834857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47892 (or 47889 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 28834857 is about 5369.8097731670. The cubic root of 28834857 is about 306.6473862852.

The spelling of 28834857 in words is "twenty-eight million, eight hundred thirty-four thousand, eight hundred fifty-seven".