1102003644 has 48 divisors (see below), whose sum is σ = 2943653888. Its totient is φ = 314324928.

The previous prime is 1102003633. The next prime is 1102003649. The reversal of 1102003644 is 4463002011.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1102003644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102003649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40182 + ... + 61794.

Almost surely, 2^1102003644 is an apocalyptic number.

1102003644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1102003644 is an abundant number, since it is smaller than the sum of its proper divisors (1841650244).

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

1102003644 is a wasteful number, since it uses less digits than its factorization.

1102003644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234 (or 22232 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1102003644 is about 33196.4402308440. The cubic root of 1102003644 is about 1032.9064994917.

Adding to 1102003644 its reverse (4463002011), we get a palindrome (5565005655).

The spelling of 1102003644 in words is "one billion, one hundred two million, three thousand, six hundred forty-four".