28105130 has 8 divisors (see below), whose sum is σ = 50589252. Its totient is φ = 11242048.

The previous prime is 28105117. The next prime is 28105151. The reversal of 28105130 is 3150182.

It can be written as a sum of positive squares in 2 ways, for example, as 27050401 + 1054729 = 5201^2 + 1027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405247 + ... + 1405266.

Almost surely, 2^28105130 is an apocalyptic number.

28105130 is a deficient number, since it is larger than the sum of its proper divisors (22484122).

28105130 is a wasteful number, since it uses less digits than its factorization.

28105130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810520.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 28105130 is about 5301.4271663393. The cubic root of 28105130 is about 304.0384661044.

The spelling of 28105130 in words is "twenty-eight million, one hundred five thousand, one hundred thirty".