195315840 has 256 divisors, whose sum is σ = 705024000. Its totient is φ = 51093504.

The previous prime is 195315823. The next prime is 195315853. The reversal of 195315840 is 48513591.

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 = 195315795 and 195315804.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1537857 + ... + 1537983.

It is an arithmetic number, because the mean of its divisors is an integer number (2754000).

Almost surely, 2^195315840 is an apocalyptic number.

195315840 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 195315840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352512000).

195315840 is an abundant number, since it is smaller than the sum of its proper divisors (509708160).

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

195315840 is a wasteful number, since it uses less digits than its factorization.

195315840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 195315840 is about 13975.5443543355. The cubic root of 195315840 is about 580.2019114695.

The spelling of 195315840 in words is "one hundred ninety-five million, three hundred fifteen thousand, eight hundred forty".