1871887038672 has 80 divisors (see below), whose sum is σ = 5526964108800. Its totient is φ = 534782242176.

The previous prime is 1871887038661. The next prime is 1871887038733. The reversal of 1871887038672 is 2768307881781.

It is a super-2 number, since 2×1871887038672² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4126579 + ... + 4557677.

It is an arithmetic number, because the mean of its divisors is an integer number (69087051360).

Almost surely, 2^{1871887038672} is an apocalyptic number.

1871887038672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1871887038672 is an abundant number, since it is smaller than the sum of its proper divisors (3655077070128).

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

1871887038672 is a wasteful number, since it uses less digits than its factorization.

1871887038672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444040 (or 444034 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 66.

The spelling of 1871887038672 in words is "one trillion, eight hundred seventy-one billion, eight hundred eighty-seven million, thirty-eight thousand, six hundred seventy-two".