19108872 has 80 divisors (see below), whose sum is σ = 55038060. Its totient is φ = 6189696.

The previous prime is 19108823. The next prime is 19108877. The reversal of 19108872 is 27880191.

It can be written as a sum of positive squares in 2 ways, for example, as 18198756 + 910116 = 4266^2 + 954^2 .

It is a super-2 number, since 2×19108872² = 730297978224768, which contains 22 as substring.

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 (19108877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23578 + ... + 24374.

Almost surely, 2^19108872 is an apocalyptic number.

19108872 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 19108872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27519030).

19108872 is an abundant number, since it is smaller than the sum of its proper divisors (35929188).

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

19108872 is a wasteful number, since it uses less digits than its factorization.

19108872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 19108872 is about 4371.3695794339. The cubic root of 19108872 is about 267.3488685418.

The spelling of 19108872 in words is "nineteen million, one hundred eight thousand, eight hundred seventy-two".