28193704 has 64 divisors (see below), whose sum is σ = 67743360. Its totient is φ = 10679040.

The previous prime is 28193657. The next prime is 28193707. The reversal of 28193704 is 40739182.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28193704.

It is not an unprimeable number, because it can be changed into a prime (28193707) 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, 22174 + ... + 23410.

It is an arithmetic number, because the mean of its divisors is an integer number (1058490).

Almost surely, 2^28193704 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 28193704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33871680).

28193704 is an abundant number, since it is smaller than the sum of its proper divisors (39549656).

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

28193704 is a wasteful number, since it uses less digits than its factorization.

28193704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28193704 is about 5309.7743831541. The cubic root of 28193704 is about 304.3575260345.

The spelling of 28193704 in words is "twenty-eight million, one hundred ninety-three thousand, seven hundred four".