11837640 has 64 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 3018752.

The previous prime is 11837611. The next prime is 11837647. The reversal of 11837640 is 4673811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11837598 and 11837607.

It is not an unprimeable number, because it can be changed into a prime (11837647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616 + ... + 4904.

It is an arithmetic number, because the mean of its divisors is an integer number (579150).

Almost surely, 2^11837640 is an apocalyptic number.

11837640 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 11837640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18532800).

11837640 is an abundant number, since it is smaller than the sum of its proper divisors (25227960).

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

11837640 is a wasteful number, since it uses less digits than its factorization.

11837640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 11837640 is about 3440.5871591925. The cubic root of 11837640 is about 227.9056242215.

The spelling of 11837640 in words is "eleven million, eight hundred thirty-seven thousand, six hundred forty".