28510120 has 32 divisors (see below), whose sum is σ = 64338120. Its totient is φ = 11370240.

The previous prime is 28510093. The next prime is 28510123. The reversal of 28510120 is 2101582.

It can be written as a sum of positive squares in 4 ways, for example, as 11519236 + 16990884 = 3394^2 + 4122^2 .

It is not an unprimeable number, because it can be changed into a prime (28510123) 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, 15994 + ... + 17686.

Almost surely, 2^28510120 is an apocalyptic number.

28510120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28510120 is an abundant number, since it is smaller than the sum of its proper divisors (35828000).

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

28510120 is a wasteful number, since it uses less digits than its factorization.

28510120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 28510120 is about 5339.4868667317. The cubic root of 28510120 is about 305.4918874630.

The spelling of 28510120 in words is "twenty-eight million, five hundred ten thousand, one hundred twenty".