11601720 has 192 divisors, whose sum is σ = 42325920. Its totient is φ = 2737152.

The previous prime is 11601679. The next prime is 11601721. The reversal of 11601720 is 2710611.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11601693 and 11601702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173127 + ... + 173193.

Almost surely, 2^11601720 is an apocalyptic number.

11601720 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 11601720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21162960).

11601720 is an abundant number, since it is smaller than the sum of its proper divisors (30724200).

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

11601720 is a wasteful number, since it uses less digits than its factorization.

11601720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 11601720 is about 3406.1297685203. The cubic root of 11601720 is about 226.3814270538.

It can be divided in two parts, 11601 and 720, that added together give a palindrome (12321).

The spelling of 11601720 in words is "eleven million, six hundred one thousand, seven hundred twenty".