11191620 has 96 divisors (see below), whose sum is σ = 35352576. Its totient is φ = 2620800.

The previous prime is 11191603. The next prime is 11191657. The reversal of 11191620 is 2619111.

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, 20187 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (368256).

Almost surely, 2^11191620 is an apocalyptic number.

11191620 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 11191620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17676288).

11191620 is an abundant number, since it is smaller than the sum of its proper divisors (24160956).

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

11191620 is a wasteful number, since it uses less digits than its factorization.

11191620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 11191620 is about 3345.3878698889. The cubic root of 11191620 is about 223.6819732235.

It can be divided in two parts, 11191 and 620, that added together give a palindrome (11811).

The spelling of 11191620 in words is "eleven million, one hundred ninety-one thousand, six hundred twenty".