195229440 has 360 divisors, whose sum is σ = 801329760. Its totient is φ = 44457984.

The previous prime is 195229429. The next prime is 195229457. The reversal of 195229440 is 44922591.

195229440 is a `hidden beast` number, since 1 + 9 + 522 + 94 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×195229440² = 76229068485427200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 195229395 and 195229404.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 725626 + ... + 725894.

It is an arithmetic number, because the mean of its divisors is an integer number (2225916).

Almost surely, 2^195229440 is an apocalyptic number.

195229440 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 195229440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400664880).

195229440 is an abundant number, since it is smaller than the sum of its proper divisors (606100320).

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

195229440 is an equidigital number, since it uses as much as digits as its factorization.

195229440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 195229440 is about 13972.4528984713. The cubic root of 195229440 is about 580.1163460613.

The spelling of 195229440 in words is "one hundred ninety-five million, two hundred twenty-nine thousand, four hundred forty".