1103144644 has 18 divisors (see below), whose sum is σ = 2245687710. Its totient is φ = 472776192.

The previous prime is 1103144639. The next prime is 1103144657. The reversal of 1103144644 is 4464413011.

It can be written as a sum of positive squares in only one way, i.e., 1098127044 + 5017600 = 33138^2 + 2240^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

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 5 ways as a sum of consecutive naturals, for example, 2813949 + ... + 2814340.

Almost surely, 2^1103144644 is an apocalyptic number.

1103144644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1103144644 is an abundant number, since it is smaller than the sum of its proper divisors (1142543066).

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

1103144644 is a wasteful number, since it uses less digits than its factorization.

1103144644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628307 (or 5628298 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1103144644 is about 33213.6213623266. The cubic root of 1103144644 is about 1033.2628624389.

Adding to 1103144644 its reverse (4464413011), we get a palindrome (5567557655).

The spelling of 1103144644 in words is "one billion, one hundred three million, one hundred forty-four thousand, six hundred forty-four".