28515130 has 16 divisors (see below), whose sum is σ = 58659840. Its totient is φ = 9776592.

The previous prime is 28515119. The next prime is 28515139. The reversal of 28515130 is 3151582.

It is a happy number.

It is a super-2 number, since 2×28515130² = 1626225277833800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28515095 and 28515104.

It is not an unprimeable number, because it can be changed into a prime (28515139) 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, 203610 + ... + 203749.

It is an arithmetic number, because the mean of its divisors is an integer number (3666240).

Almost surely, 2^28515130 is an apocalyptic number.

28515130 is an abundant number, since it is smaller than the sum of its proper divisors (30144710).

28515130 is a wasteful number, since it uses less digits than its factorization.

28515130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407373.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 28515130 is about 5339.9559923280. The cubic root of 28515130 is about 305.5097808136.

The spelling of 28515130 in words is "twenty-eight million, five hundred fifteen thousand, one hundred thirty".