193428 has 36 divisors (see below), whose sum is σ = 509600. Its totient is φ = 64152.

The previous prime is 193423. The next prime is 193433. The reversal of 193428 is 824391.

It is an interprime number because it is at equal distance from previous prime (193423) and next prime (193433).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193423) 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, 873 + ... + 1071.

2¹⁹³⁴²⁸ is an apocalyptic number.

193428 is a gapful number since it is divisible by the number (18) 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 193428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254800).

193428 is an abundant number, since it is smaller than the sum of its proper divisors (316172).

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

193428 is a wasteful number, since it uses less digits than its factorization.

193428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 204 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 193428 is about 439.8045020233. The cubic root of 193428 is about 57.8326527745.

The spelling of 193428 in words is "one hundred ninety-three thousand, four hundred twenty-eight".