28855500 has 48 divisors (see below), whose sum is σ = 84031584. Its totient is φ = 7694400.

The previous prime is 28855487. The next prime is 28855577. The reversal of 28855500 is 555882.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8119 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (1750658).

Almost surely, 2^28855500 is an apocalyptic number.

28855500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28855500 is an abundant number, since it is smaller than the sum of its proper divisors (55176084).

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

28855500 is a wasteful number, since it uses less digits than its factorization.

28855500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19259 (or 19247 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 28855500 is about 5371.7315644027. The cubic root of 28855500 is about 306.7205455638.

It can be divided in two parts, 2885 and 5500, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 28855500 in words is "twenty-eight million, eight hundred fifty-five thousand, five hundred".