195379940 has 96 divisors (see below), whose sum is σ = 500097024. Its totient is φ = 62663040.

The previous prime is 195379939. The next prime is 195379969. The reversal of 195379940 is 49973591.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150695 + ... + 151985.

It is an arithmetic number, because the mean of its divisors is an integer number (5209344).

Almost surely, 2^195379940 is an apocalyptic number.

195379940 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 195379940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250048512).

195379940 is an abundant number, since it is smaller than the sum of its proper divisors (304717084).

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

195379940 is a wasteful number, since it uses less digits than its factorization.

195379940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 195379940 is about 13977.8374579189. The cubic root of 195379940 is about 580.2653759838.

The spelling of 195379940 in words is "one hundred ninety-five million, three hundred seventy-nine thousand, nine hundred forty".