28156674 has 96 divisors (see below), whose sum is σ = 72394560. Its totient is φ = 7233408.

The previous prime is 28156673. The next prime is 28156697. The reversal of 28156674 is 47665182.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (80640) is a multiple of the sum of its prime factors (224).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28156673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202497 + ... + 202635.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^28156674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28156674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36197280).

28156674 is an abundant number, since it is smaller than the sum of its proper divisors (44237886).

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

28156674 is a wasteful number, since it uses less digits than its factorization.

28156674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 217 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 28156674 is about 5306.2862719608. The cubic root of 28156674 is about 304.2242185296.

The spelling of 28156674 in words is "twenty-eight million, one hundred fifty-six thousand, six hundred seventy-four".