195197440 has 40 divisors (see below), whose sum is σ = 468022500. Its totient is φ = 78077952.

The previous prime is 195197437. The next prime is 195197461. The reversal of 195197440 is 44791591.

It can be written as a sum of positive squares in 2 ways, for example, as 195105024 + 92416 = 13968^2 + 304^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 195197393 and 195197402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35565 + ... + 40684.

Almost surely, 2^195197440 is an apocalyptic number.

195197440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195197440 is an abundant number, since it is smaller than the sum of its proper divisors (272825060).

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

195197440 is an frugal number, since it uses more digits than its factorization.

195197440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76272 (or 76256 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 195197440 is about 13971.3077412245. The cubic root of 195197440 is about 580.0846487630.

The spelling of 195197440 in words is "one hundred ninety-five million, one hundred ninety-seven thousand, four hundred forty".