11900520 has 80 divisors (see below), whose sum is σ = 40009860. Its totient is φ = 3172608.

The previous prime is 11900519. The next prime is 11900521. The reversal of 11900520 is 2500911.

11900520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11900519) and next prime (11900521).

It can be written as a sum of positive squares in 2 ways, for example, as 10614564 + 1285956 = 3258^2 + 1134^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11900493 and 11900502.

It is not an unprimeable number, because it can be changed into a prime (11900521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1404 + ... + 5076.

Almost surely, 2^11900520 is an apocalyptic number.

11900520 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 11900520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20004930).

11900520 is an abundant number, since it is smaller than the sum of its proper divisors (28109340).

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

11900520 is a wasteful number, since it uses less digits than its factorization.

11900520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696 (or 3683 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 11900520 is about 3449.7130315433. The cubic root of 11900520 is about 228.3084467996.

It can be divided in two parts, 119005 and 20, that added together give a square (119025 = 345²).

The spelling of 11900520 in words is "eleven million, nine hundred thousand, five hundred twenty".