194259816 has 64 divisors (see below), whose sum is σ = 571363200. Its totient is φ = 60943104.

The previous prime is 194259811. The next prime is 194259827. The reversal of 194259816 is 618952491.

194259816 is a `hidden beast` number, since 1 + 9 + 42 + 598 + 16 = 666.

It is a super-4 number, since 4×194259816⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (194259811) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22780 + ... + 30123.

It is an arithmetic number, because the mean of its divisors is an integer number (8927550).

Almost surely, 2^194259816 is an apocalyptic number.

It is an amenable number.

194259816 is an abundant number, since it is smaller than the sum of its proper divisors (377103384).

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

194259816 is a wasteful number, since it uses less digits than its factorization.

194259816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52935 (or 52925 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 194259816 is about 13937.7120073562. The cubic root of 194259816 is about 579.1543522550.

It can be divided in two parts, 19425 and 9816, that added together give a square (29241 = 171²).

The spelling of 194259816 in words is "one hundred ninety-four million, two hundred fifty-nine thousand, eight hundred sixteen".