195787440 has 60 divisors (see below), whose sum is σ = 657521904. Its totient is φ = 52209792.

The previous prime is 195787411. The next prime is 195787441. The reversal of 195787440 is 44787591.

It is a happy number.

195787440 is a `hidden beast` number, since 1 + 9 + 578 + 74 + 4 + 0 = 666.

195787440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (195787441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135244 + ... + 136683.

Almost surely, 2^195787440 is an apocalyptic number.

195787440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195787440 is an abundant number, since it is smaller than the sum of its proper divisors (461734464).

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

195787440 is a wasteful number, since it uses less digits than its factorization.

195787440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271946 (or 271937 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 195787440 is about 13992.4065121051. The cubic root of 195787440 is about 580.6685117730.

The spelling of 195787440 in words is "one hundred ninety-five million, seven hundred eighty-seven thousand, four hundred forty".