195109428 has 24 divisors (see below), whose sum is σ = 460742688. Its totient is φ = 64252576.

The previous prime is 195109417. The next prime is 195109441. The reversal of 195109428 is 824901591.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 96951 + ... + 98942.

It is an arithmetic number, because the mean of its divisors is an integer number (19197612).

Almost surely, 2^195109428 is an apocalyptic number.

It is an amenable number.

195109428 is an abundant number, since it is smaller than the sum of its proper divisors (265633260).

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

195109428 is a wasteful number, since it uses less digits than its factorization.

195109428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195983 (or 195981 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 195109428 is about 13968.1576451585. The cubic root of 195109428 is about 579.9974514355.

The spelling of 195109428 in words is "one hundred ninety-five million, one hundred nine thousand, four hundred twenty-eight".