28918134 has 60 divisors (see below), whose sum is σ = 75398004. Its totient is φ = 8260056.

The previous prime is 28918129. The next prime is 28918159. The reversal of 28918134 is 43181982.

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 29 ways as a sum of consecutive naturals, for example, 6117 + ... + 9759.

Almost surely, 2^28918134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28918134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37699002).

28918134 is an abundant number, since it is smaller than the sum of its proper divisors (46479870).

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

28918134 is a wasteful number, since it uses less digits than its factorization.

28918134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671 (or 3655 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 28918134 is about 5377.5583678841. The cubic root of 28918134 is about 306.9423086181.

It can be divided in two parts, 2891 and 8134, that added together give a square (11025 = 105²).

The spelling of 28918134 in words is "twenty-eight million, nine hundred eighteen thousand, one hundred thirty-four".