19872860 has 96 divisors (see below), whose sum is σ = 52039680. Its totient is φ = 6220800.

The previous prime is 19872857. The next prime is 19872871. The reversal of 19872860 is 6827891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82340 + ... + 82580.

It is an arithmetic number, because the mean of its divisors is an integer number (542080).

Almost surely, 2^19872860 is an apocalyptic number.

19872860 is a gapful number since it is divisible by the number (10) 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 19872860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26019840).

19872860 is an abundant number, since it is smaller than the sum of its proper divisors (32166820).

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

19872860 is a wasteful number, since it uses less digits than its factorization.

19872860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 19872860 is about 4457.8986080888. The cubic root of 19872860 is about 270.8653534265.

The spelling of 19872860 in words is "nineteen million, eight hundred seventy-two thousand, eight hundred sixty".