195436640 has 96 divisors (see below), whose sum is σ = 530820864. Its totient is φ = 66608640.

The previous prime is 195436639. The next prime is 195436651. The reversal of 195436640 is 46634591.

195436640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 195436594 and 195436603.

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, 235907 + ... + 236733.

It is an arithmetic number, because the mean of its divisors is an integer number (5529384).

Almost surely, 2^195436640 is an apocalyptic number.

195436640 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 195436640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265410432).

195436640 is an abundant number, since it is smaller than the sum of its proper divisors (335384224).

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

195436640 is a wasteful number, since it uses less digits than its factorization.

195436640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 195436640 is about 13979.8655215277. The cubic root of 195436640 is about 580.3215022928.

The spelling of 195436640 in words is "one hundred ninety-five million, four hundred thirty-six thousand, six hundred forty".