28260919 has 8 divisors (see below), whose sum is σ = 30285360. Its totient is φ = 26276736.

The previous prime is 28260901. The next prime is 28260949. The reversal of 28260919 is 91906282.

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

It is a cyclic number.

It is not a de Polignac number, because 28260919 - 2⁵ = 28260887 is a prime.

It is a super-2 number, since 2×28260919² = 1597359085449122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28260949) 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, 8604 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (3785670).

Almost surely, 2^28260919 is an apocalyptic number.

28260919 is a deficient number, since it is larger than the sum of its proper divisors (2024441).

28260919 is a wasteful number, since it uses less digits than its factorization.

28260919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20129.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 28260919 is about 5316.0999802487. The cubic root of 28260919 is about 304.5992012150.

The spelling of 28260919 in words is "twenty-eight million, two hundred sixty thousand, nine hundred nineteen".