194420880 has 60 divisors (see below), whose sum is σ = 652932540. Its totient is φ = 51845376.

The previous prime is 194420873. The next prime is 194420881. The reversal of 194420880 is 88024491.

It can be written as a sum of positive squares in 2 ways, for example, as 93779856 + 100641024 = 9684^2 + 10032^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (194420881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134295 + ... + 135734.

It is an arithmetic number, because the mean of its divisors is an integer number (10882209).

Almost surely, 2^194420880 is an apocalyptic number.

194420880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194420880 is an abundant number, since it is smaller than the sum of its proper divisors (458511660).

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

194420880 is a wasteful number, since it uses less digits than its factorization.

194420880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270048 (or 270039 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 194420880 is about 13943.4888030220. The cubic root of 194420880 is about 579.3143701632.

The spelling of 194420880 in words is "one hundred ninety-four million, four hundred twenty thousand, eight hundred eighty".