1971088872 has 64 divisors (see below), whose sum is σ = 5108252160. Its totient is φ = 633139200.

The previous prime is 1971088853. The next prime is 1971088877. The reversal of 1971088872 is 2788801791.

It is not an unprimeable number, because it can be changed into a prime (1971088877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173808 + ... + 184800.

It is an arithmetic number, because the mean of its divisors is an integer number (79816440).

Almost surely, 2^1971088872 is an apocalyptic number.

1971088872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1971088872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2554126080).

1971088872 is an abundant number, since it is smaller than the sum of its proper divisors (3137163288).

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

1971088872 is a wasteful number, since it uses less digits than its factorization.

1971088872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11274 (or 11270 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 51.

The square root of 1971088872 is about 44396.9466517687. The cubic root of 1971088872 is about 1253.8206031889.

The spelling of 1971088872 in words is "one billion, nine hundred seventy-one million, eighty-eight thousand, eight hundred seventy-two".