194040000 has 630 divisors, whose sum is σ = 881970804. Its totient is φ = 40320000.

The previous prime is 194039999. The next prime is 194040001. The reversal of 194040000 is 40491.

It is an interprime number because it is at equal distance from previous prime (194039999) and next prime (194040001).

It is a tau number, because it is divible by the number of its divisors (630).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (194040001) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 17639995 + ... + 17640005.

Almost surely, 2^194040000 is an apocalyptic number.

194040000 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 194040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440985402).

194040000 is an abundant number, since it is smaller than the sum of its proper divisors (687930804).

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

194040000 is a wasteful number, since it uses less digits than its factorization.

194040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 194040000 is about 13929.8241194927. The cubic root of 194040000 is about 578.9358211413.

Adding to 194040000 its reverse (40491), we get a palindrome (194080491).

The spelling of 194040000 in words is "one hundred ninety-four million, forty thousand".