11465640 has 48 divisors (see below), whose sum is σ = 37264500. Its totient is φ = 3057408.

The previous prime is 11465639. The next prime is 11465653. The reversal of 11465640 is 4656411.

11465640 is a `hidden beast` number, since 1 + 1 + 4 + 656 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11410884 + 54756 = 3378^2 + 234^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15565 + ... + 16284.

Almost surely, 2^11465640 is an apocalyptic number.

11465640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11465640 is an abundant number, since it is smaller than the sum of its proper divisors (25798860).

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

11465640 is a wasteful number, since it uses less digits than its factorization.

11465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31866 (or 31859 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 11465640 is about 3386.0950961247. The cubic root of 11465640 is about 225.4928455965.

It can be divided in two parts, 1146 and 5640, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 11465640 in words is "eleven million, four hundred sixty-five thousand, six hundred forty".