28726704 has 80 divisors (see below), whose sum is σ = 85336800. Its totient is φ = 9241344.

The previous prime is 28726703. The next prime is 28726751. The reversal of 28726704 is 40762782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28726703) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11382 + ... + 13674.

It is an arithmetic number, because the mean of its divisors is an integer number (1066710).

Almost surely, 2^28726704 is an apocalyptic number.

28726704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28726704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42668400).

28726704 is an abundant number, since it is smaller than the sum of its proper divisors (56610096).

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

28726704 is a wasteful number, since it uses less digits than its factorization.

28726704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 28726704 is about 5359.7298439380. The cubic root of 28726704 is about 306.2635177151.

The spelling of 28726704 in words is "twenty-eight million, seven hundred twenty-six thousand, seven hundred four".