28505160 has 48 divisors (see below), whose sum is σ = 92642940. Its totient is φ = 7601280.

The previous prime is 28505159. The next prime is 28505161. The reversal of 28505160 is 6150582.

It is an interprime number because it is at equal distance from previous prime (28505159) and next prime (28505161).

It can be written as a sum of positive squares in 2 ways, for example, as 28323684 + 181476 = 5322^2 + 426^2 .

It is not an unprimeable number, because it can be changed into a prime (28505161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39231 + ... + 39950.

Almost surely, 2^28505160 is an apocalyptic number.

28505160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28505160 is an abundant number, since it is smaller than the sum of its proper divisors (64137780).

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

28505160 is a wasteful number, since it uses less digits than its factorization.

28505160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79198 (or 79191 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 28505160 is about 5339.0223824217. The cubic root of 28505160 is about 305.4741706237.

The spelling of 28505160 in words is "twenty-eight million, five hundred five thousand, one hundred sixty".