194422428 has 36 divisors (see below), whose sum is σ = 495975480. Its totient is φ = 64211616.

The previous prime is 194422399. The next prime is 194422439. The reversal of 194422428 is 824224491.

194422428 is a `hidden beast` number, since 194 + 42 + 2 + 428 = 666.

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 = 194422392 and 194422401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20850 + ... + 28697.

Almost surely, 2^194422428 is an apocalyptic number.

194422428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

194422428 is an abundant number, since it is smaller than the sum of its proper divisors (301553052).

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

194422428 is a wasteful number, since it uses less digits than its factorization.

194422428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49666 (or 49661 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 194422428 is about 13943.5443126918. The cubic root of 194422428 is about 579.3159076803.

The spelling of 194422428 in words is "one hundred ninety-four million, four hundred twenty-two thousand, four hundred twenty-eight".