194117680 has 40 divisors (see below), whose sum is σ = 475081200. Its totient is φ = 73559808.

The previous prime is 194117653. The next prime is 194117681. The reversal of 194117680 is 86711491.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (194117681) 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, 62335 + ... + 65374.

It is an arithmetic number, because the mean of its divisors is an integer number (11877030).

Almost surely, 2^194117680 is an apocalyptic number.

194117680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194117680 is an abundant number, since it is smaller than the sum of its proper divisors (280963520).

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

194117680 is a wasteful number, since it uses less digits than its factorization.

194117680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127741 (or 127735 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 194117680 is about 13932.6121025456. The cubic root of 194117680 is about 579.0130659272.

The spelling of 194117680 in words is "one hundred ninety-four million, one hundred seventeen thousand, six hundred eighty".