28343574 has 64 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 8031744.

The previous prime is 28343569. The next prime is 28343593. The reversal of 28343574 is 47534382.

It is a happy number.

28343574 is a `hidden beast` number, since 2 + 83 + 4 + 3 + 574 = 666.

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 31 ways as a sum of consecutive naturals, for example, 62902 + ... + 63350.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^28343574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28343574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36288000).

28343574 is an abundant number, since it is smaller than the sum of its proper divisors (44232426).

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

28343574 is a wasteful number, since it uses less digits than its factorization.

28343574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 628 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 28343574 is about 5323.8683304530. The cubic root of 28343574 is about 304.8958669861.

The spelling of 28343574 in words is "twenty-eight million, three hundred forty-three thousand, five hundred seventy-four".