3872787646860 has 144 divisors (see below), whose sum is σ = 12817982661120. Its totient is φ = 938668874880.

The previous prime is 3872787646859. The next prime is 3872787646879. The reversal of 3872787646860 is 686467872783.

3872787646860 is a `hidden beast` number, since 3 + 8 + 7 + 27 + 87 + 6 + 468 + 60 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9783139 + ... + 10171301.

It is an arithmetic number, because the mean of its divisors is an integer number (89013768480).

Almost surely, 2^{3872787646860} is an apocalyptic number.

3872787646860 is a gapful number since it is divisible by the number (30) 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 3872787646860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6408991330560).

3872787646860 is an abundant number, since it is smaller than the sum of its proper divisors (8945195014260).

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

3872787646860 is a wasteful number, since it uses less digits than its factorization.

3872787646860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393228 (or 393223 counting only the distinct ones).

The product of its (nonzero) digits is 910393344, while the sum is 72.

The spelling of 3872787646860 in words is "three trillion, eight hundred seventy-two billion, seven hundred eighty-seven million, six hundred forty-six thousand, eight hundred sixty".