195438730 has 16 divisors (see below), whose sum is σ = 352104264. Its totient is φ = 78105600.

The previous prime is 195438721. The next prime is 195438757. The reversal of 195438730 is 37834591.

It can be written as a sum of positive squares in 4 ways, for example, as 144216081 + 51222649 = 12009^2 + 7157^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3874 + ... + 20146.

Almost surely, 2^195438730 is an apocalyptic number.

195438730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195438730 is a deficient number, since it is larger than the sum of its proper divisors (156665534).

195438730 is a wasteful number, since it uses less digits than its factorization.

195438730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17481.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 195438730 is about 13979.9402716893. The cubic root of 195438730 is about 580.3235709387.

The spelling of 195438730 in words is "one hundred ninety-five million, four hundred thirty-eight thousand, seven hundred thirty".