194855640 has 256 divisors, whose sum is σ = 729216000. Its totient is φ = 40642560.

The previous prime is 194855627. The next prime is 194855651. The reversal of 194855640 is 46558491.

194855640 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 194855592 and 194855601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 462630 + ... + 463050.

It is an arithmetic number, because the mean of its divisors is an integer number (2848500).

Almost surely, 2^194855640 is an apocalyptic number.

194855640 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 194855640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364608000).

194855640 is an abundant number, since it is smaller than the sum of its proper divisors (534360360).

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

194855640 is a wasteful number, since it uses less digits than its factorization.

194855640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 194855640 is about 13959.0701696066. The cubic root of 194855640 is about 579.7458656756.

The spelling of 194855640 in words is "one hundred ninety-four million, eight hundred fifty-five thousand, six hundred forty".