28875020 has 48 divisors (see below), whose sum is σ = 62270208. Its totient is φ = 11244480.

The previous prime is 28875019. The next prime is 28875023. The reversal of 28875020 is 2057882.

28875020 = T₁₄₉ + T₁₅₀ + ... + T₅₆₀.

It is not an unprimeable number, because it can be changed into a prime (28875023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220355 + ... + 220485.

It is an arithmetic number, because the mean of its divisors is an integer number (1297296).

Almost surely, 2^28875020 is an apocalyptic number.

28875020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28875020 is an abundant number, since it is smaller than the sum of its proper divisors (33395188).

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

28875020 is a wasteful number, since it uses less digits than its factorization.

28875020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28875020 is about 5373.5481760193. The cubic root of 28875020 is about 306.7896928147.

The spelling of 28875020 in words is "twenty-eight million, eight hundred seventy-five thousand, twenty".