28130757 has 8 divisors (see below), whose sum is σ = 38215584. Its totient is φ = 18399888.

The previous prime is 28130749. The next prime is 28130759. The reversal of 28130757 is 75703182.

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

It is not a de Polignac number, because 28130757 - 2³ = 28130749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130759) 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, 88303 + ... + 88620.

It is an arithmetic number, because the mean of its divisors is an integer number (4776948).

Almost surely, 2^28130757 is an apocalyptic number.

It is an amenable number.

28130757 is a deficient number, since it is larger than the sum of its proper divisors (10084827).

28130757 is a wasteful number, since it uses less digits than its factorization.

28130757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176979.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 28130757 is about 5303.8436062916. The cubic root of 28130757 is about 304.1308481331.

The spelling of 28130757 in words is "twenty-eight million, one hundred thirty thousand, seven hundred fifty-seven".