9091940 has 108 divisors (see below), whose sum is σ = 24008628. Its totient is φ = 2872320.

The previous prime is 9091939. The next prime is 9091961. The reversal of 9091940 is 491909.

9091940 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 7744 + 9084196 = 88^2 + 3014^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9091897 and 9091906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 534812 + ... + 534828.

Almost surely, 2^9091940 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 9091940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12004314).

9091940 is an abundant number, since it is smaller than the sum of its proper divisors (14916688).

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

9091940 is a wasteful number, since it uses less digits than its factorization.

9091940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9091940 is about 3015.2843978637. The cubic root of 9091940 is about 208.7142910461.

The spelling of 9091940 in words is "nine million, ninety-one thousand, nine hundred forty".