11864656 has 10 divisors (see below), whose sum is σ = 22987802. Its totient is φ = 5932320.

The previous prime is 11864653. The next prime is 11864659. The reversal of 11864656 is 65646811.

It is an interprime number because it is at equal distance from previous prime (11864653) and next prime (11864659).

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 2005056 = 3140^2 + 1416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11864653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370755 + ... + 370786.

Almost surely, 2^11864656 is an apocalyptic number.

11864656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

11864656 is the 2179-th centered pentagonal number.

It is an amenable number.

11864656 is a deficient number, since it is larger than the sum of its proper divisors (11123146).

11864656 is an equidigital number, since it uses as much as digits as its factorization.

11864656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741549 (or 741543 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 11864656 is about 3444.5109957728. The cubic root of 11864656 is about 228.0788687855.

The spelling of 11864656 in words is "eleven million, eight hundred sixty-four thousand, six hundred fifty-six".