194431840 has 96 divisors (see below), whose sum is σ = 476661024. Its totient is φ = 74895360.

The previous prime is 194431837. The next prime is 194431841. The reversal of 194431840 is 48134491.

194431840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 194431796 and 194431805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194431841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701782 + ... + 702058.

It is an arithmetic number, because the mean of its divisors is an integer number (4965219).

Almost surely, 2^194431840 is an apocalyptic number.

194431840 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 194431840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238330512).

194431840 is an abundant number, since it is smaller than the sum of its proper divisors (282229184).

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

194431840 is a wasteful number, since it uses less digits than its factorization.

194431840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 194431840 is about 13943.8818124653. The cubic root of 194431840 is about 579.3252557673.

The spelling of 194431840 in words is "one hundred ninety-four million, four hundred thirty-one thousand, eight hundred forty".