195009620 has 24 divisors (see below), whose sum is σ = 441022344. Its totient is φ = 72003456.

The previous prime is 195009587. The next prime is 195009671. The reversal of 195009620 is 26900591.

It can be written as a sum of positive squares in 4 ways, for example, as 46267204 + 148742416 = 6802^2 + 12196^2 .

It is a congruent number.

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, 374759 + ... + 375278.

It is an arithmetic number, because the mean of its divisors is an integer number (18375931).

Almost surely, 2^195009620 is an apocalyptic number.

195009620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195009620 is an abundant number, since it is smaller than the sum of its proper divisors (246012724).

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

195009620 is a wasteful number, since it uses less digits than its factorization.

195009620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750059 (or 750057 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 195009620 is about 13964.5844907752. The cubic root of 195009620 is about 579.8985355605.

The spelling of 195009620 in words is "one hundred ninety-five million, nine thousand, six hundred twenty".