28115956 has 12 divisors (see below), whose sum is σ = 53676000. Its totient is φ = 12779960.

The previous prime is 28115951. The next prime is 28115963. The reversal of 28115956 is 65951182.

It is a super-3 number, since 3×28115956³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28115951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319456 + ... + 319543.

It is an arithmetic number, because the mean of its divisors is an integer number (4473000).

Almost surely, 2^28115956 is an apocalyptic number.

It is an amenable number.

28115956 is a deficient number, since it is larger than the sum of its proper divisors (25560044).

28115956 is a wasteful number, since it uses less digits than its factorization.

28115956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639014 (or 639012 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 28115956 is about 5302.4481138433. The cubic root of 28115956 is about 304.0774992856.

The spelling of 28115956 in words is "twenty-eight million, one hundred fifteen thousand, nine hundred fifty-six".