194220428 has 24 divisors (see below), whose sum is σ = 346076640. Its totient is φ = 95356800.

The previous prime is 194220419. The next prime is 194220431. The reversal of 194220428 is 824022491.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 194220394 and 194220403.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 51950 + ... + 55562.

It is an arithmetic number, because the mean of its divisors is an integer number (14419860).

Almost surely, 2^194220428 is an apocalyptic number.

It is an amenable number.

194220428 is a deficient number, since it is larger than the sum of its proper divisors (151856212).

194220428 is a wasteful number, since it uses less digits than its factorization.

194220428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857 (or 3855 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 194220428 is about 13936.2989347961. The cubic root of 194220428 is about 579.1152066166.

The spelling of 194220428 in words is "one hundred ninety-four million, two hundred twenty thousand, four hundred twenty-eight".