195090464 has 48 divisors (see below), whose sum is σ = 395725176. Its totient is φ = 94617600.

The previous prime is 195090449. The next prime is 195090481. The reversal of 195090464 is 464090591.

It can be written as a sum of positive squares in 4 ways, for example, as 85008400 + 110082064 = 9220^2 + 10492^2 .

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, 315884 + ... + 316500.

Almost surely, 2^195090464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195090464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197862588).

195090464 is an abundant number, since it is smaller than the sum of its proper divisors (200634712).

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

195090464 is a wasteful number, since it uses less digits than its factorization.

195090464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 195090464 is about 13967.4787989816. The cubic root of 195090464 is about 579.9786595398.

The spelling of 195090464 in words is "one hundred ninety-five million, ninety thousand, four hundred sixty-four".