11942840 has 128 divisors (see below), whose sum is σ = 35199360. Its totient is φ = 3538944.

The previous prime is 11942807. The next prime is 11942851. The reversal of 11942840 is 4824911.

11942840 is nontrivially palindromic in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61784 + ... + 61976.

It is an arithmetic number, because the mean of its divisors is an integer number (274995).

Almost surely, 2^11942840 is an apocalyptic number.

11942840 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 11942840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17599680).

11942840 is an abundant number, since it is smaller than the sum of its proper divisors (23256520).

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

11942840 is a wasteful number, since it uses less digits than its factorization.

11942840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 11942840 is about 3455.8414315475. The cubic root of 11942840 is about 228.5787594375.

The spelling of 11942840 in words is "eleven million, nine hundred forty-two thousand, eight hundred forty".