194880040 has 16 divisors (see below), whose sum is σ = 438480180. Its totient is φ = 77952000.

The previous prime is 194879987. The next prime is 194880041. The reversal of 194880040 is 40088491.

It can be written as a sum of positive squares in 2 ways, for example, as 190495204 + 4384836 = 13802^2 + 2094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 194879978 and 194880005.

It is not an unprimeable number, because it can be changed into a prime (194880041) 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 3 ways as a sum of consecutive naturals, for example, 2435961 + ... + 2436040.

Almost surely, 2^194880040 is an apocalyptic number.

194880040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194880040 is an abundant number, since it is smaller than the sum of its proper divisors (243600140).

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

194880040 is a wasteful number, since it uses less digits than its factorization.

194880040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872012 (or 4872008 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 194880040 is about 13959.9441259627. The cubic root of 194880040 is about 579.7700634333.

The spelling of 194880040 in words is "one hundred ninety-four million, eight hundred eighty thousand, forty".