11331720 has 48 divisors (see below), whose sum is σ = 36829260. Its totient is φ = 3021696.

The previous prime is 11331713. The next prime is 11331737. The reversal of 11331720 is 2713311.

It can be written as a sum of positive squares in 2 ways, for example, as 11329956 + 1764 = 3366^2 + 42^2 .

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

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11331693 and 11331702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15379 + ... + 16098.

Almost surely, 2^11331720 is an apocalyptic number.

11331720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331720 is an abundant number, since it is smaller than the sum of its proper divisors (25497540).

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

11331720 is a wasteful number, since it uses less digits than its factorization.

11331720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31494 (or 31487 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 11331720 is about 3366.2620218872. The cubic root of 11331720 is about 224.6114776471.

The spelling of 11331720 in words is "eleven million, three hundred thirty-one thousand, seven hundred twenty".