195979240 has 16 divisors (see below), whose sum is σ = 440953380. Its totient is φ = 78391680.

The previous prime is 195979211. The next prime is 195979307. The reversal of 195979240 is 42979591.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 194825764 + 1153476 = 13958^2 + 1074^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2449701 + ... + 2449780.

Almost surely, 2^195979240 is an apocalyptic number.

195979240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195979240 is an abundant number, since it is smaller than the sum of its proper divisors (244974140).

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

195979240 is a wasteful number, since it uses less digits than its factorization.

195979240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899492 (or 4899488 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 195979240 is about 13999.2585517948. The cubic root of 195979240 is about 580.8580640622.

The spelling of 195979240 in words is "one hundred ninety-five million, nine hundred seventy-nine thousand, two hundred forty".