28004086 has 8 divisors (see below), whose sum is σ = 45824904. Its totient is φ = 12729120.

The previous prime is 28004069. The next prime is 28004089. The reversal of 28004086 is 68040082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28004089) 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, 636435 + ... + 636478.

It is an arithmetic number, because the mean of its divisors is an integer number (5728113).

Almost surely, 2^28004086 is an apocalyptic number.

28004086 is a deficient number, since it is larger than the sum of its proper divisors (17820818).

28004086 is a wasteful number, since it uses less digits than its factorization.

28004086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272926.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28004086 is about 5291.8886987540. Note that the first 3 decimals coincide. The cubic root of 28004086 is about 303.6736673055.

It can be divided in two parts, 280040 and 86, that added together give a triangular number (280126 = T₇₄₈).

The spelling of 28004086 in words is "twenty-eight million, four thousand, eighty-six".