28515060 has 216 divisors, whose sum is σ = 104196456. Its totient is φ = 6289920.

The previous prime is 28515017. The next prime is 28515061. The reversal of 28515060 is 6051582.

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 28005264 = 714^2 + 5292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28515061) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 467430 + ... + 467490.

It is an arithmetic number, because the mean of its divisors is an integer number (482391).

Almost surely, 2^28515060 is an apocalyptic number.

28515060 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 28515060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52098228).

28515060 is an abundant number, since it is smaller than the sum of its proper divisors (75681396).

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

28515060 is a wasteful number, since it uses less digits than its factorization.

28515060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 131 counting only the distinct ones).

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

The square root of 28515060 is about 5339.9494379629. The cubic root of 28515060 is about 305.5095308211.

The spelling of 28515060 in words is "twenty-eight million, five hundred fifteen thousand, sixty".