28764858 has 16 divisors (see below), whose sum is σ = 60031296. Its totient is φ = 9171360.

The previous prime is 28764829. The next prime is 28764859. The reversal of 28764858 is 85846782.

It is not an unprimeable number, because it can be changed into a prime (28764859) 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, 104083 + ... + 104358.

It is an arithmetic number, because the mean of its divisors is an integer number (3751956).

Almost surely, 2^28764858 is an apocalyptic number.

28764858 is an abundant number, since it is smaller than the sum of its proper divisors (31266438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28764858 is a wasteful number, since it uses less digits than its factorization.

28764858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208469.

The product of its digits is 860160, while the sum is 48.

The square root of 28764858 is about 5363.2879840635. The cubic root of 28764858 is about 306.3990479261.

The spelling of 28764858 in words is "twenty-eight million, seven hundred sixty-four thousand, eight hundred fifty-eight".