194000640 has 144 divisors (see below), whose sum is σ = 652444800. Its totient is φ = 48992256.

The previous prime is 194000629. The next prime is 194000641. The reversal of 194000640 is 46000491.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 194000640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194000641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71631 + ... + 74289.

Almost surely, 2^194000640 is an apocalyptic number.

194000640 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 194000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326222400).

194000640 is an abundant number, since it is smaller than the sum of its proper divisors (458444160).

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

194000640 is a wasteful number, since it uses less digits than its factorization.

194000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 194000640 is about 13928.4112518262. The cubic root of 194000640 is about 578.8966737922.

The spelling of 194000640 in words is "one hundred ninety-four million, six hundred forty", and thus it is an aban number.