1872155872 has 72 divisors (see below), whose sum is σ = 3957632784. Its totient is φ = 871514112.

The previous prime is 1872155869. The next prime is 1872155881. The reversal of 1872155872 is 2785512781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 896013 + ... + 898099.

It is an arithmetic number, because the mean of its divisors is an integer number (54967122).

Almost surely, 2^1872155872 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 1872155872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978816392).

1872155872 is an abundant number, since it is smaller than the sum of its proper divisors (2085476912).

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

1872155872 is a wasteful number, since it uses less digits than its factorization.

1872155872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228 (or 2203 counting only the distinct ones).

The product of its digits is 313600, while the sum is 46.

The square root of 1872155872 is about 43268.4165645104. The cubic root of 1872155872 is about 1232.4822351780.

The spelling of 1872155872 in words is "one billion, eight hundred seventy-two million, one hundred fifty-five thousand, eight hundred seventy-two".