28658934 has 48 divisors (see below), whose sum is σ = 65105040. Its totient is φ = 9447840.

The previous prime is 28658933. The next prime is 28658939. The reversal of 28658934 is 43985682.

It is a self number, because there is not a number n which added to its sum of digits gives 28658934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28658933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52704 + ... + 53244.

It is an arithmetic number, because the mean of its divisors is an integer number (1356355).

Almost surely, 2^28658934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28658934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32552520).

28658934 is an abundant number, since it is smaller than the sum of its proper divisors (36446106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28658934 is a wasteful number, since it uses less digits than its factorization.

28658934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 655 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28658934 is about 5353.4039638346. The cubic root of 28658934 is about 306.0224896965.

It can be divided in two parts, 28658 and 934, that added together give a palindrome (29592).

The spelling of 28658934 in words is "twenty-eight million, six hundred fifty-eight thousand, nine hundred thirty-four".