194733640 has 64 divisors (see below), whose sum is σ = 484133760. Its totient is φ = 70118400.

The previous prime is 194733619. The next prime is 194733647. The reversal of 194733640 is 46337491.

194733640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 194733640.

It is not an unprimeable number, because it can be changed into a prime (194733647) 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, 9415 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (7564590).

Almost surely, 2^194733640 is an apocalyptic number.

194733640 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 194733640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242066880).

194733640 is an abundant number, since it is smaller than the sum of its proper divisors (289400120).

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

194733640 is a wasteful number, since it uses less digits than its factorization.

194733640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502 (or 12498 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 194733640 is about 13954.6995668126. The cubic root of 194733640 is about 579.6248465765.

The spelling of 194733640 in words is "one hundred ninety-four million, seven hundred thirty-three thousand, six hundred forty".