28704592 has 120 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 11128320.

The previous prime is 28704553. The next prime is 28704593. The reversal of 28704592 is 29540782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704593) 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, 610713 + ... + 610759.

It is an arithmetic number, because the mean of its divisors is an integer number (593712).

Almost surely, 2^28704592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28704592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35622720).

28704592 is an abundant number, since it is smaller than the sum of its proper divisors (42540848).

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

28704592 is a wasteful number, since it uses less digits than its factorization.

28704592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28704592 is about 5357.6666562973. Note that the first 4 decimals coincide. The cubic root of 28704592 is about 306.1849167820.

The spelling of 28704592 in words is "twenty-eight million, seven hundred four thousand, five hundred ninety-two".