194139760 has 20 divisors (see below), whose sum is σ = 451375128. Its totient is φ = 77655872.

The previous prime is 194139727. The next prime is 194139767. The reversal of 194139760 is 67931491.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194139767) 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, 1213294 + ... + 1213453.

Almost surely, 2^194139760 is an apocalyptic number.

194139760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194139760 is an abundant number, since it is smaller than the sum of its proper divisors (257235368).

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

194139760 is a wasteful number, since it uses less digits than its factorization.

194139760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426760 (or 2426754 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 194139760 is about 13933.4044655282. The cubic root of 194139760 is about 579.0350184592.

The spelling of 194139760 in words is "one hundred ninety-four million, one hundred thirty-nine thousand, seven hundred sixty".