11697640 has 16 divisors (see below), whose sum is σ = 26319780. Its totient is φ = 4679040.

The previous prime is 11697611. The next prime is 11697641. The reversal of 11697640 is 4679611.

It can be written as a sum of positive squares in 2 ways, for example, as 10876804 + 820836 = 3298^2 + 906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11697596 and 11697605.

It is not an unprimeable number, because it can be changed into a prime (11697641) 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, 146181 + ... + 146260.

Almost surely, 2^11697640 is an apocalyptic number.

11697640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11697640 is an abundant number, since it is smaller than the sum of its proper divisors (14622140).

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

11697640 is a wasteful number, since it uses less digits than its factorization.

11697640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292452 (or 292448 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 11697640 is about 3420.1812817452. The cubic root of 11697640 is about 227.0036030918.

The spelling of 11697640 in words is "eleven million, six hundred ninety-seven thousand, six hundred forty".