28360520 has 32 divisors (see below), whose sum is σ = 65371320. Its totient is φ = 11066880.

The previous prime is 28360513. The next prime is 28360523. The reversal of 28360520 is 2506382.

It can be written as a sum of positive squares in 4 ways, for example, as 7365796 + 20994724 = 2714^2 + 4582^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28360520.

It is not an unprimeable number, because it can be changed into a prime (28360523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7007 + ... + 10286.

Almost surely, 2^28360520 is an apocalyptic number.

28360520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28360520 is an abundant number, since it is smaller than the sum of its proper divisors (37010800).

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

28360520 is a wasteful number, since it uses less digits than its factorization.

28360520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17345 (or 17341 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 28360520 is about 5325.4596045787. The cubic root of 28360520 is about 304.9566183932.

The spelling of 28360520 in words is "twenty-eight million, three hundred sixty thousand, five hundred twenty".