11722140 has 36 divisors (see below), whose sum is σ = 35557704. Its totient is φ = 3125856.

The previous prime is 11722133. The next prime is 11722189. The reversal of 11722140 is 4122711.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

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, 32382 + ... + 32741.

It is an arithmetic number, because the mean of its divisors is an integer number (987714).

Almost surely, 2^11722140 is an apocalyptic number.

11722140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11722140 is an abundant number, since it is smaller than the sum of its proper divisors (23835564).

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

11722140 is a wasteful number, since it uses less digits than its factorization.

11722140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65138 (or 65133 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 11722140 is about 3423.7610897958. The cubic root of 11722140 is about 227.1619743526.

Adding to 11722140 its reverse (4122711), we get a palindrome (15844851).

The spelling of 11722140 in words is "eleven million, seven hundred twenty-two thousand, one hundred forty".