28204078 has 16 divisors (see below), whose sum is σ = 48821760. Its totient is φ = 11969496.

The previous prime is 28204067. The next prime is 28204081. The reversal of 28204078 is 87040282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8338 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (3051360).

Almost surely, 2^28204078 is an apocalyptic number.

28204078 is a deficient number, since it is larger than the sum of its proper divisors (20617682).

28204078 is a wasteful number, since it uses less digits than its factorization.

28204078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19671.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28204078 is about 5310.7511709738. The cubic root of 28204078 is about 304.3948513631.

The spelling of 28204078 in words is "twenty-eight million, two hundred four thousand, seventy-eight".