28875040 has 48 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 11488000.

The previous prime is 28875037. The next prime is 28875073. The reversal of 28875040 is 4057882.

It is a junction number, because it is equal to n+sod(n) for n = 28874987 and 28875005.

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, 39801 + ... + 40519.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^28875040 is an apocalyptic number.

28875040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28875040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

28875040 is an abundant number, since it is smaller than the sum of its proper divisors (39709280).

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

28875040 is a wasteful number, since it uses less digits than its factorization.

28875040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 28875040 is about 5373.5500369867. The cubic root of 28875040 is about 306.7897636464.

The spelling of 28875040 in words is "twenty-eight million, eight hundred seventy-five thousand, forty".