195031830 has 64 divisors (see below), whose sum is σ = 538928640. Its totient is φ = 44246784.

The previous prime is 195031829. The next prime is 195031843. The reversal of 195031830 is 38130591.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25381 + ... + 32159.

It is an arithmetic number, because the mean of its divisors is an integer number (8420760).

Almost surely, 2^195031830 is an apocalyptic number.

195031830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195031830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269464320).

195031830 is an abundant number, since it is smaller than the sum of its proper divisors (343896810).

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

195031830 is a wasteful number, since it uses less digits than its factorization.

195031830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 195031830 is about 13965.3796940864. The cubic root of 195031830 is about 579.9205499575.

The spelling of 195031830 in words is "one hundred ninety-five million, thirty-one thousand, eight hundred thirty".