28948839 has 8 divisors (see below), whose sum is σ = 39087360. Its totient is φ = 19054776.

The previous prime is 28948811. The next prime is 28948849. The reversal of 28948839 is 93884982.

It is a happy number.

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

It is not a de Polignac number, because 28948839 - 2¹¹ = 28946791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28948791 and 28948800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948849) 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, 60837 + ... + 61310.

It is an arithmetic number, because the mean of its divisors is an integer number (4885920).

Almost surely, 2^28948839 is an apocalyptic number.

28948839 is a deficient number, since it is larger than the sum of its proper divisors (10138521).

28948839 is a wasteful number, since it uses less digits than its factorization.

28948839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122229.

The product of its digits is 995328, while the sum is 51.

The square root of 28948839 is about 5380.4125306523. The cubic root of 28948839 is about 307.0509063337.

The spelling of 28948839 in words is "twenty-eight million, nine hundred forty-eight thousand, eight hundred thirty-nine".