11731940 has 24 divisors (see below), whose sum is σ = 26877312. Its totient is φ = 4266080.

The previous prime is 11731939. The next prime is 11731943. The reversal of 11731940 is 4913711.

It is not an unprimeable number, because it can be changed into a prime (11731943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26444 + ... + 26883.

It is an arithmetic number, because the mean of its divisors is an integer number (1119888).

Almost surely, 2^11731940 is an apocalyptic number.

11731940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11731940 is an abundant number, since it is smaller than the sum of its proper divisors (15145372).

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

11731940 is a wasteful number, since it uses less digits than its factorization.

11731940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53347 (or 53345 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 11731940 is about 3425.1919654233. The cubic root of 11731940 is about 227.2252610691.

It can be divided in two parts, 1173 and 1940, that added together give a palindrome (3113).

The spelling of 11731940 in words is "eleven million, seven hundred thirty-one thousand, nine hundred forty".