195411840 has 128 divisors (see below), whose sum is σ = 670874400. Its totient is φ = 48095232.

The previous prime is 195411833. The next prime is 195411851. The reversal of 195411840 is 48114591.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 21046 + ... + 28874.

Almost surely, 2^195411840 is an apocalyptic number.

195411840 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 195411840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335437200).

195411840 is an abundant number, since it is smaller than the sum of its proper divisors (475462560).

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

195411840 is a wasteful number, since it uses less digits than its factorization.

195411840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864 (or 7852 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 195411840 is about 13978.9785034530. The cubic root of 195411840 is about 580.2969545552.

It can be divided in two parts, 195411 and 840, that added together give a triangular number (196251 = T₆₂₆).

The spelling of 195411840 in words is "one hundred ninety-five million, four hundred eleven thousand, eight hundred forty".