194377728 has 96 divisors (see below), whose sum is σ = 548992080. Its totient is φ = 60948480.

The previous prime is 194377723. The next prime is 194377747. The reversal of 194377728 is 827773491.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×194377728² = 75565402284883968, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194377723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103518 + ... + 105378.

Almost surely, 2^194377728 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 194377728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274496040).

194377728 is an abundant number, since it is smaller than the sum of its proper divisors (354614352).

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

194377728 is a wasteful number, since it uses less digits than its factorization.

194377728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1883 counting only the distinct ones).

The product of its digits is 592704, while the sum is 48.

The square root of 194377728 is about 13941.9413282369. The cubic root of 194377728 is about 579.2715071000.

The spelling of 194377728 in words is "one hundred ninety-four million, three hundred seventy-seven thousand, seven hundred twenty-eight".