28270578 has 16 divisors (see below), whose sum is σ = 64618560. Its totient is φ = 8077296.

The previous prime is 28270573. The next prime is 28270591. The reversal of 28270578 is 87507282.

It is not an unprimeable number, because it can be changed into a prime (28270573) 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, 336513 + ... + 336596.

It is an arithmetic number, because the mean of its divisors is an integer number (4038660).

Almost surely, 2^28270578 is an apocalyptic number.

28270578 is an abundant number, since it is smaller than the sum of its proper divisors (36347982).

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

28270578 is a wasteful number, since it uses less digits than its factorization.

28270578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673121.

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 28270578 is about 5317.0083693746. The cubic root of 28270578 is about 304.6338991733.

The spelling of 28270578 in words is "twenty-eight million, two hundred seventy thousand, five hundred seventy-eight".