194428 has 12 divisors (see below), whose sum is σ = 366520. Its totient is φ = 89712.

The previous prime is 194413. The next prime is 194431. The reversal of 194428 is 824491.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 194396 and 194405.

It is a congruent number.

It is an unprimeable number.

194428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1818 + ... + 1921.

2¹⁹⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

194428 is a deficient number, since it is larger than the sum of its proper divisors (172092).

194428 is a wasteful number, since it uses less digits than its factorization.

194428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756 (or 3754 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 194428 is about 440.9399052025. The cubic root of 194428 is about 57.9321441880.

The spelling of 194428 in words is "one hundred ninety-four thousand, four hundred twenty-eight".