11505080 has 32 divisors (see below), whose sum is σ = 26492400. Its totient is φ = 4494336.

The previous prime is 11505071. The next prime is 11505121. The reversal of 11505080 is 8050511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625 + ... + 5064.

Almost surely, 2^11505080 is an apocalyptic number.

11505080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11505080 is an abundant number, since it is smaller than the sum of its proper divisors (14987320).

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

11505080 is a wasteful number, since it uses less digits than its factorization.

11505080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743 (or 6739 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 11505080 is about 3391.9139140019. The cubic root of 11505080 is about 225.7511030198.

Adding to 11505080 its reverse (8050511), we get a palindrome (19555591).

The spelling of 11505080 in words is "eleven million, five hundred five thousand, eighty".