194638920 has 128 divisors (see below), whose sum is σ = 672537600. Its totient is φ = 44142336.

The previous prime is 194638919. The next prime is 194638943. The reversal of 194638920 is 29836491.

194638920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115927 + ... + 117593.

It is an arithmetic number, because the mean of its divisors is an integer number (5254200).

Almost surely, 2^194638920 is an apocalyptic number.

194638920 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 194638920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336268800).

194638920 is an abundant number, since it is smaller than the sum of its proper divisors (477898680).

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

194638920 is a wasteful number, since it uses less digits than its factorization.

194638920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 194638920 is about 13951.3053152743. The cubic root of 194638920 is about 579.5308532814.

The spelling of 194638920 in words is "one hundred ninety-four million, six hundred thirty-eight thousand, nine hundred twenty".