195784240 has 80 divisors (see below), whose sum is σ = 484522560. Its totient is φ = 73318400.

The previous prime is 195784229. The next prime is 195784271. The reversal of 195784240 is 42487591.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 195784193 and 195784202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488040 + ... + 488440.

It is an arithmetic number, because the mean of its divisors is an integer number (6056532).

Almost surely, 2^195784240 is an apocalyptic number.

195784240 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 195784240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242261280).

195784240 is an abundant number, since it is smaller than the sum of its proper divisors (288738320).

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

195784240 is a wasteful number, since it uses less digits than its factorization.

195784240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 195784240 is about 13992.2921639022. The cubic root of 195784240 is about 580.6653482242.

The spelling of 195784240 in words is "one hundred ninety-five million, seven hundred eighty-four thousand, two hundred forty".