28578120 has 32 divisors (see below), whose sum is σ = 85734720. Its totient is φ = 7620800.

The previous prime is 28578103. The next prime is 28578127. The reversal of 28578120 is 2187582.

It is not an unprimeable number, because it can be changed into a prime (28578127) 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, 118956 + ... + 119195.

It is an arithmetic number, because the mean of its divisors is an integer number (2679210).

Almost surely, 2^28578120 is an apocalyptic number.

28578120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28578120 is an abundant number, since it is smaller than the sum of its proper divisors (57156600).

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

28578120 is a wasteful number, since it uses less digits than its factorization.

28578120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238165 (or 238161 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28578120 is about 5345.8507274334. The cubic root of 28578120 is about 305.7345726860.

The spelling of 28578120 in words is "twenty-eight million, five hundred seventy-eight thousand, one hundred twenty".