194426820 has 144 divisors (see below), whose sum is σ = 703422720. Its totient is φ = 42501888.

The previous prime is 194426809. The next prime is 194426833. The reversal of 194426820 is 28624491.

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

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, 25626 + ... + 32334.

It is an arithmetic number, because the mean of its divisors is an integer number (4884880).

Almost surely, 2^194426820 is an apocalyptic number.

194426820 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 194426820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351711360).

194426820 is an abundant number, since it is smaller than the sum of its proper divisors (508995900).

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

194426820 is a wasteful number, since it uses less digits than its factorization.

194426820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6754 (or 6749 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 194426820 is about 13943.7018040404. The cubic root of 194426820 is about 579.3202698936.

It can be divided in two parts, 19442 and 6820, that added together give a palindrome (26262).

The spelling of 194426820 in words is "one hundred ninety-four million, four hundred twenty-six thousand, eight hundred twenty".