194839680 has 384 divisors, whose sum is σ = 767448000. Its totient is φ = 41803776.

The previous prime is 194839663. The next prime is 194839727. The reversal of 194839680 is 86938491.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1787466 + ... + 1787574.

Almost surely, 2^194839680 is an apocalyptic number.

194839680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194839680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383724000).

194839680 is an abundant number, since it is smaller than the sum of its proper divisors (572608320).

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

194839680 is a wasteful number, since it uses less digits than its factorization.

194839680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 194839680 is about 13958.4984865852. The cubic root of 194839680 is about 579.7300368691.

The spelling of 194839680 in words is "one hundred ninety-four million, eight hundred thirty-nine thousand, six hundred eighty".