11655480 has 128 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 2872320.

The previous prime is 11655467. The next prime is 11655487. The reversal of 11655480 is 8455611.

11655480 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11655487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113109 + ... + 113211.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^11655480 is an apocalyptic number.

11655480 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 11655480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18869760).

11655480 is an abundant number, since it is smaller than the sum of its proper divisors (26084040).

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

11655480 is a wasteful number, since it uses less digits than its factorization.

11655480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 11655480 is about 3414.0123022625. The cubic root of 11655480 is about 226.7305567687.

The spelling of 11655480 in words is "eleven million, six hundred fifty-five thousand, four hundred eighty".