11610640 has 20 divisors (see below), whose sum is σ = 26994924. Its totient is φ = 4644224.

The previous prime is 11610629. The next prime is 11610649. The reversal of 11610640 is 4601611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3154176 + 8456464 = 1776^2 + 2908^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×11610640² = 269613922419200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11610649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72487 + ... + 72646.

Almost surely, 2^11610640 is an apocalyptic number.

11610640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11610640 is an abundant number, since it is smaller than the sum of its proper divisors (15384284).

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

11610640 is a wasteful number, since it uses less digits than its factorization.

11610640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145146 (or 145140 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 11610640 is about 3407.4389209493. The cubic root of 11610640 is about 226.4394300921.

The spelling of 11610640 in words is "eleven million, six hundred ten thousand, six hundred forty".