28643958 has 48 divisors (see below), whose sum is σ = 71225856. Its totient is φ = 8149680.

The previous prime is 28643941. The next prime is 28643981. The reversal of 28643958 is 85934682.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 58093 + ... + 58583.

It is an arithmetic number, because the mean of its divisors is an integer number (1483872).

Almost surely, 2^28643958 is an apocalyptic number.

28643958 is an abundant number, since it is smaller than the sum of its proper divisors (42581898).

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

28643958 is a wasteful number, since it uses less digits than its factorization.

28643958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 966 counting only the distinct ones).

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

The square root of 28643958 is about 5352.0050448407. The cubic root of 28643958 is about 305.9691754161.

It can be divided in two parts, 286 and 43958, that added together give a palindrome (44244).

The spelling of 28643958 in words is "twenty-eight million, six hundred forty-three thousand, nine hundred fifty-eight".