11913520 has 40 divisors (see below), whose sum is σ = 27926784. Its totient is φ = 4726272.

The previous prime is 11913509. The next prime is 11913529. The reversal of 11913520 is 2531911.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 11913491 and 11913500.

It is not an unprimeable number, because it can be changed into a prime (11913529) 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 7 ways as a sum of consecutive naturals, for example, 10417 + ... + 11503.

Almost surely, 2^11913520 is an apocalyptic number.

11913520 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 11913520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13963392).

11913520 is an abundant number, since it is smaller than the sum of its proper divisors (16013264).

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

11913520 is a wasteful number, since it uses less digits than its factorization.

11913520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 11913520 is about 3451.5967319489. The cubic root of 11913520 is about 228.3915504433.

The spelling of 11913520 in words is "eleven million, nine hundred thirteen thousand, five hundred twenty".