194435640 has 160 divisors (see below), whose sum is σ = 746966880. Its totient is φ = 44437248.

The previous prime is 194435639. The next prime is 194435671. The reversal of 194435640 is 46534491.

194435640 is a `hidden beast` number, since 1 + 9 + 4 + 4 + 3 + 5 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 194435595 and 194435604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18394 + ... + 26966.

It is an arithmetic number, because the mean of its divisors is an integer number (4668543).

Almost surely, 2^194435640 is an apocalyptic number.

194435640 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 194435640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373483440).

194435640 is an abundant number, since it is smaller than the sum of its proper divisors (552531240).

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

194435640 is a wasteful number, since it uses less digits than its factorization.

194435640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8603 (or 8590 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 194435640 is about 13944.0180722774. The cubic root of 194435640 is about 579.3290298776.

The spelling of 194435640 in words is "one hundred ninety-four million, four hundred thirty-five thousand, six hundred forty".