9091872 has 96 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 2847744.

The previous prime is 9091871. The next prime is 9091879. The reversal of 9091872 is 2781909.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9091871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14379 + ... + 14997.

It is an arithmetic number, because the mean of its divisors is an integer number (292950).

Almost surely, 2^9091872 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 9091872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14061600).

9091872 is an abundant number, since it is smaller than the sum of its proper divisors (19031328).

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

9091872 is a wasteful number, since it uses less digits than its factorization.

9091872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 641 counting only the distinct ones).

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

The square root of 9091872 is about 3015.2731219576. The cubic root of 9091872 is about 208.7137707095.

The spelling of 9091872 in words is "nine million, ninety-one thousand, eight hundred seventy-two".