1244020500 has 72 divisors (see below), whose sum is σ = 3924484200. Its totient is φ = 331737600.

The previous prime is 1244020489. The next prime is 1244020501. The reversal of 1244020500 is 50204421.

1244020500 is a `hidden beast` number, since 124 + 40 + 2 + 0 + 500 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 136328976 + 1107691524 = 11676^2 + 33282^2 .

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 (1244020501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133725 + ... + 142724.

It is an arithmetic number, because the mean of its divisors is an integer number (54506725).

Almost surely, 2^1244020500 is an apocalyptic number.

1244020500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244020500 is an abundant number, since it is smaller than the sum of its proper divisors (2680463700).

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

1244020500 is a wasteful number, since it uses less digits than its factorization.

1244020500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276474 (or 276459 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1244020500 is about 35270.6747879878. The cubic root of 1244020500 is about 1075.4969398856.

Adding to 1244020500 its reverse (50204421), we get a palindrome (1294224921).

The spelling of 1244020500 in words is "one billion, two hundred forty-four million, twenty thousand, five hundred".