11655920 has 40 divisors (see below), whose sum is σ = 27242304. Its totient is φ = 4637952.

The previous prime is 11655913. The next prime is 11655929. The reversal of 11655920 is 2955611.

11655920 = T₄₄₄ + T₄₄₅ + ... + T₅₃₉.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11655929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29162 + ... + 29558.

Almost surely, 2^11655920 is an apocalyptic number.

11655920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11655920 is an abundant number, since it is smaller than the sum of its proper divisors (15586384).

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

11655920 is a wasteful number, since it uses less digits than its factorization.

11655920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 11655920 is about 3414.0767419611. The cubic root of 11655920 is about 226.7334097954.

The spelling of 11655920 in words is "eleven million, six hundred fifty-five thousand, nine hundred twenty".