194406228 has 36 divisors (see below), whose sum is σ = 491868468. Its totient is φ = 64742400.

The previous prime is 194406221. The next prime is 194406253. The reversal of 194406228 is 822604491.

It can be written as a sum of positive squares in 2 ways, for example, as 193265604 + 1140624 = 13902^2 + 1068^2 .

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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 194406192 and 194406201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194406221) 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, 55950 + ... + 59322.

It is an arithmetic number, because the mean of its divisors is an integer number (13663013).

Almost surely, 2^194406228 is an apocalyptic number.

194406228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

194406228 is an abundant number, since it is smaller than the sum of its proper divisors (297462240).

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

194406228 is a wasteful number, since it uses less digits than its factorization.

194406228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984 (or 4979 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 194406228 is about 13942.9633865976. The cubic root of 194406228 is about 579.2998169812.

The spelling of 194406228 in words is "one hundred ninety-four million, four hundred six thousand, two hundred twenty-eight".