11619640 has 32 divisors (see below), whose sum is σ = 27522000. Its totient is φ = 4402944.

The previous prime is 11619617. The next prime is 11619649. The reversal of 11619640 is 4691611.

It is a junction number, because it is equal to n+sod(n) for n = 11619599 and 11619608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11619649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6885 + ... + 8404.

Almost surely, 2^11619640 is an apocalyptic number.

11619640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11619640 is an abundant number, since it is smaller than the sum of its proper divisors (15902360).

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

11619640 is a wasteful number, since it uses less digits than its factorization.

11619640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15319 (or 15315 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 11619640 is about 3408.7593050845. The cubic root of 11619640 is about 226.4979232364.

It can be divided in two parts, 1161 and 9640, that added together give a palindrome (10801).

The spelling of 11619640 in words is "eleven million, six hundred nineteen thousand, six hundred forty".