28971130 has 8 divisors (see below), whose sum is σ = 52148052. Its totient is φ = 11588448.

The previous prime is 28971127. The next prime is 28971149. The reversal of 28971130 is 3117982.

It can be written as a sum of positive squares in 2 ways, for example, as 24117921 + 4853209 = 4911^2 + 2203^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28971092 and 28971101.

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, 1448547 + ... + 1448566.

Almost surely, 2^28971130 is an apocalyptic number.

28971130 is a deficient number, since it is larger than the sum of its proper divisors (23176922).

28971130 is a wasteful number, since it uses less digits than its factorization.

28971130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897120.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 28971130 is about 5382.4836274716. The cubic root of 28971130 is about 307.1296972393.

The spelling of 28971130 in words is "twenty-eight million, nine hundred seventy-one thousand, one hundred thirty".