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2001871872 = 2103272111331

2001871872 has 792 divisors, whose sum is σ = 8154461952. Its totient is φ = 464486400.

The previous prime is 2001871871. The next prime is 2001871877. The reversal of 2001871872 is 2781781002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (792).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2001871871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 64576497 + ... + 64576527.

Almost surely, 22001871872 is an apocalyptic number.

2001871872 is a gapful number since it is divisible by the number (22) 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 2001871872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4077230976).

2001871872 is an abundant number, since it is smaller than the sum of its proper divisors (6152590080).

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

2001871872 is a wasteful number, since it uses less digits than its factorization.

2001871872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 2001871872 is about 44742.2828206161. The cubic root of 2001871872 is about 1260.3139958189.

The spelling of 2001871872 in words is "two billion, one million, eight hundred seventy-one thousand, eight hundred seventy-two".