8109972 has 108 divisors (see below), whose sum is σ = 23447424. Its totient is φ = 2358720.

The previous prime is 8109971. The next prime is 8109973. The reversal of 8109972 is 2799018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8109971) and next prime (8109973).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109971) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188583 + ... + 188625.

Almost surely, 2^8109972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8109972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11723712).

8109972 is an abundant number, since it is smaller than the sum of its proper divisors (15337452).

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

8109972 is a wasteful number, since it uses less digits than its factorization.

8109972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8109972 is about 2847.8012571105. The cubic root of 8109972 is about 200.9122658615.

The spelling of 8109972 in words is "eight million, one hundred nine thousand, nine hundred seventy-two".