194402728 has 48 divisors (see below), whose sum is σ = 402296220. Its totient is φ = 87998976.

The previous prime is 194402717. The next prime is 194402729. The reversal of 194402728 is 827204491.

194402728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 108618084 + 85784644 = 10422^2 + 9262^2 .

It is not an unprimeable number, because it can be changed into a prime (194402729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70300 + ... + 73012.

Almost surely, 2^194402728 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 194402728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201148110).

194402728 is an abundant number, since it is smaller than the sum of its proper divisors (207893492).

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

194402728 is a wasteful number, since it uses less digits than its factorization.

194402728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 194402728 is about 13942.8378746939. The cubic root of 194402728 is about 579.2963404781.

The spelling of 194402728 in words is "one hundred ninety-four million, four hundred two thousand, seven hundred twenty-eight".