28965951 has 16 divisors (see below), whose sum is σ = 49043200. Its totient is φ = 16551864.

The previous prime is 28965949. The next prime is 28966009. The reversal of 28965951 is 15956982.

It is not a de Polignac number, because 28965951 - 2¹ = 28965949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28965897 and 28965906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28965151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76441 + ... + 76818.

It is an arithmetic number, because the mean of its divisors is an integer number (3065200).

Almost surely, 2^28965951 is an apocalyptic number.

28965951 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28965951 is a deficient number, since it is larger than the sum of its proper divisors (20077249).

28965951 is a wasteful number, since it uses less digits than its factorization.

28965951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153275 (or 153269 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 28965951 is about 5382.0025083606. The cubic root of 28965951 is about 307.1113948869. Note that the first 3 decimals are identical.

The spelling of 28965951 in words is "twenty-eight million, nine hundred sixty-five thousand, nine hundred fifty-one".