11639740 has 48 divisors (see below), whose sum is σ = 28353024. Its totient is φ = 3931200.

The previous prime is 11639729. The next prime is 11639741. The reversal of 11639740 is 4793611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639741) 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, 9355 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (590688).

Almost surely, 2^11639740 is an apocalyptic number.

11639740 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 11639740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14176512).

11639740 is an abundant number, since it is smaller than the sum of its proper divisors (16713284).

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

11639740 is a wasteful number, since it uses less digits than its factorization.

11639740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 11639740 is about 3411.7063179588. The cubic root of 11639740 is about 226.6284489583.

The spelling of 11639740 in words is "eleven million, six hundred thirty-nine thousand, seven hundred forty".