1244402100 has 108 divisors (see below), whose sum is σ = 3907874880. Its totient is φ = 331214400.

The previous prime is 1244402077. The next prime is 1244402101. The reversal of 1244402100 is 12044421.

1244402100 is a `hidden beast` number, since 12 + 4 + 440 + 210 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244402101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 664165 + ... + 666035.

Almost surely, 2^1244402100 is an apocalyptic number.

1244402100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244402100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953937440).

1244402100 is an abundant number, since it is smaller than the sum of its proper divisors (2663472780).

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

1244402100 is a wasteful number, since it uses less digits than its factorization.

1244402100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1244402100 is about 35276.0839663362. The cubic root of 1244402100 is about 1075.6068972578.

Adding to 1244402100 its reverse (12044421), we get a palindrome (1256446521).

The spelling of 1244402100 in words is "one billion, two hundred forty-four million, four hundred two thousand, one hundred".