1995277172 has 96 divisors (see below), whose sum is σ = 4316390400. Its totient is φ = 788113152.

The previous prime is 1995277159. The next prime is 1995277187. The reversal of 1995277172 is 2717725991.

It is a super-2 number, since 2×1995277172² = 7962261986208635168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1995277172.

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, 3223079 + ... + 3223697.

It is an arithmetic number, because the mean of its divisors is an integer number (44962400).

Almost surely, 2^1995277172 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 1995277172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2158195200).

1995277172 is an abundant number, since it is smaller than the sum of its proper divisors (2321113228).

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

1995277172 is a wasteful number, since it uses less digits than its factorization.

1995277172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 803 counting only the distinct ones).

The product of its digits is 555660, while the sum is 50.

The square root of 1995277172 is about 44668.5255185349. The cubic root of 1995277172 is about 1258.9285365040.

The spelling of 1995277172 in words is "one billion, nine hundred ninety-five million, two hundred seventy-seven thousand, one hundred seventy-two".