195152440 has 64 divisors (see below), whose sum is σ = 518031360. Its totient is φ = 64748160.

The previous prime is 195152389. The next prime is 195152443. The reversal of 195152440 is 44251591.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195152443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2562 + ... + 19921.

It is an arithmetic number, because the mean of its divisors is an integer number (8094240).

Almost surely, 2^195152440 is an apocalyptic number.

195152440 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 195152440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259015680).

195152440 is an abundant number, since it is smaller than the sum of its proper divisors (322878920).

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

195152440 is a wasteful number, since it uses less digits than its factorization.

195152440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22532 (or 22528 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 195152440 is about 13969.6972050220. The cubic root of 195152440 is about 580.0400685755.

The spelling of 195152440 in words is "one hundred ninety-five million, one hundred fifty-two thousand, four hundred forty".