194593728 has 112 divisors (see below), whose sum is σ = 597473024. Its totient is φ = 54743040.

The previous prime is 194593723. The next prime is 194593733. The reversal of 194593728 is 827395491.

It is an interprime number because it is at equal distance from previous prime (194593723) and next prime (194593733).

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

Its product of digits (544320) is a multiple of the sum of its prime divisors (2240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194593723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88968 + ... + 91128.

Almost surely, 2^194593728 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 194593728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298736512).

194593728 is an abundant number, since it is smaller than the sum of its proper divisors (402879296).

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

194593728 is a wasteful number, since it uses less digits than its factorization.

194593728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250 (or 2240 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 194593728 is about 13949.6855878547. The cubic root of 194593728 is about 579.4859972551.

The spelling of 194593728 in words is "one hundred ninety-four million, five hundred ninety-three thousand, seven hundred twenty-eight".