194655840 has 96 divisors (see below), whose sum is σ = 627492096. Its totient is φ = 50695680.

The previous prime is 194655829. The next prime is 194655841. The reversal of 194655840 is 48556491.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×194655840² = 75781792092211200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 194655792 and 194655801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194655841) 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 15 ways as a sum of consecutive naturals, for example, 15925 + ... + 25355.

It is an arithmetic number, because the mean of its divisors is an integer number (6536376).

Almost surely, 2^194655840 is an apocalyptic number.

194655840 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 194655840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313746048).

194655840 is an abundant number, since it is smaller than the sum of its proper divisors (432836256).

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

194655840 is a wasteful number, since it uses less digits than its factorization.

194655840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492 (or 9484 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 194655840 is about 13951.9116969683. The cubic root of 194655840 is about 579.5476457056.

The spelling of 194655840 in words is "one hundred ninety-four million, six hundred fifty-five thousand, eight hundred forty".