11687620 has 48 divisors (see below), whose sum is σ = 28965888. Its totient is φ = 3876480.

The previous prime is 11687591. The next prime is 11687629. The reversal of 11687620 is 2678611.

It is a super-2 number, since 2×11687620² = 273200922528800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (11687629) 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 15 ways as a sum of consecutive naturals, for example, 2994 + ... + 5686.

It is an arithmetic number, because the mean of its divisors is an integer number (603456).

Almost surely, 2^11687620 is an apocalyptic number.

11687620 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 11687620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14482944).

11687620 is an abundant number, since it is smaller than the sum of its proper divisors (17278268).

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

11687620 is a wasteful number, since it uses less digits than its factorization.

11687620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 11687620 is about 3418.7161332875. The cubic root of 11687620 is about 226.9387687644.

Subtracting from 11687620 its reverse (2678611), we obtain a palindrome (9009009).

The spelling of 11687620 in words is "eleven million, six hundred eighty-seven thousand, six hundred twenty".