10644388 has 6 divisors (see below), whose sum is σ = 18627686. Its totient is φ = 5322192.

The previous prime is 10644383. The next prime is 10644401. The reversal of 10644388 is 88344601.

It can be written as a sum of positive squares in only one way, i.e., 7518564 + 3125824 = 2742^2 + 1768^2 .

It is a super-2 number, since 2×10644388² = 226605991789088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10644383) 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 as a sum of consecutive naturals, namely, 1330545 + ... + 1330552.

Almost surely, 2^10644388 is an apocalyptic number.

It is an amenable number.

10644388 is a deficient number, since it is larger than the sum of its proper divisors (7983298).

10644388 is a wasteful number, since it uses less digits than its factorization.

10644388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661101 (or 2661099 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 10644388 is about 3262.5738305822. The cubic root of 10644388 is about 219.9751211536.

Adding to 10644388 its reverse (88344601), we get a palindrome (98988989).

The spelling of 10644388 in words is "ten million, six hundred forty-four thousand, three hundred eighty-eight".