11641856 has 22 divisors (see below), whose sum is σ = 23274390. Its totient is φ = 5820416.

The previous prime is 11641837. The next prime is 11641859. The reversal of 11641856 is 65814611.

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 1401856 = 3200^2 + 1184^2 .

It is a super-2 number, since 2×11641856² = 271065622249472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4661 + ... + 6708.

Almost surely, 2^11641856 is an apocalyptic number.

11641856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11641856 is a deficient number, since it is larger than the sum of its proper divisors (11632534).

11641856 is an equidigital number, since it uses as much as digits as its factorization.

11641856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11389 (or 11371 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 11641856 is about 3412.0164126217. The cubic root of 11641856 is about 226.6421811305.

The spelling of 11641856 in words is "eleven million, six hundred forty-one thousand, eight hundred fifty-six".