194428415 has 8 divisors (see below), whose sum is σ = 233743920. Its totient is φ = 155256192.

The previous prime is 194428391. The next prime is 194428417. The reversal of 194428415 is 514824491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194428415 - 2¹² = 194424319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194428417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32810 + ... + 38279.

It is an arithmetic number, because the mean of its divisors is an integer number (29217990).

Almost surely, 2^194428415 is an apocalyptic number.

194428415 is a deficient number, since it is larger than the sum of its proper divisors (39315505).

194428415 is an equidigital number, since it uses as much as digits as its factorization.

194428415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71641.

The product of its digits is 46080, while the sum is 38.

The square root of 194428415 is about 13943.7589982042. The cubic root of 194428415 is about 579.3218540600.

The spelling of 194428415 in words is "one hundred ninety-four million, four hundred twenty-eight thousand, four hundred fifteen".