11311644 has 12 divisors (see below), whose sum is σ = 26393864. Its totient is φ = 3770544.

The previous prime is 11311589. The next prime is 11311661. The reversal of 11311644 is 44611311.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×11311644³ (a number of 22 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 11311644.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 471307 + ... + 471330.

Almost surely, 2^11311644 is an apocalyptic number.

It is an amenable number.

11311644 is an abundant number, since it is smaller than the sum of its proper divisors (15082220).

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

11311644 is a wasteful number, since it uses less digits than its factorization.

11311644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942644 (or 942642 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 11311644 is about 3363.2787574033. The cubic root of 11311644 is about 224.4787538818.

Adding to 11311644 its reverse (44611311), we get a palindrome (55922955).

It can be divided in two parts, 1131 and 1644, that added together give a triangular number (2775 = T₇₄).

The spelling of 11311644 in words is "eleven million, three hundred eleven thousand, six hundred forty-four".