28530078 has 8 divisors (see below), whose sum is σ = 57060168. Its totient is φ = 9510024.

The previous prime is 28530043. The next prime is 28530119. The reversal of 28530078 is 87003582.

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

28530078 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377501 + ... + 2377512.

It is an arithmetic number, because the mean of its divisors is an integer number (7132521).

Almost surely, 2^28530078 is an apocalyptic number.

28530078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28530078 is a wasteful number, since it uses less digits than its factorization.

28530078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755018.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28530078 is about 5341.3554459519. The cubic root of 28530078 is about 305.5631555477.

The spelling of 28530078 in words is "twenty-eight million, five hundred thirty thousand, seventy-eight".