194538500 has 72 divisors (see below), whose sum is σ = 460214664. Its totient is φ = 71414400.

The previous prime is 194538451. The next prime is 194538521. The reversal of 194538500 is 5835491.

It can be written as a sum of positive squares in 12 ways, for example, as 83320384 + 111218116 = 9128^2 + 10546^2 .

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1124414 + ... + 1124586.

Almost surely, 2^194538500 is an apocalyptic number.

194538500 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 194538500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230107332).

194538500 is an abundant number, since it is smaller than the sum of its proper divisors (265676164).

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

194538500 is a wasteful number, since it uses less digits than its factorization.

194538500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 194538500 is about 13947.7059045565. The cubic root of 194538500 is about 579.4311704095.

The spelling of 194538500 in words is "one hundred ninety-four million, five hundred thirty-eight thousand, five hundred".