1244372020 has 24 divisors (see below), whose sum is σ = 2703292200. Its totient is φ = 480584832.

The previous prime is 1244372011. The next prime is 1244372029. The reversal of 1244372020 is 202734421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1244372011) and next prime (1244372029).

It can be written as a sum of positive squares in 4 ways, for example, as 1245456 + 1243126564 = 1116^2 + 35258^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244372029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072155 + ... + 1073314.

It is an arithmetic number, because the mean of its divisors is an integer number (112637175).

Almost surely, 2^1244372020 is an apocalyptic number.

1244372020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244372020 is an abundant number, since it is smaller than the sum of its proper divisors (1458920180).

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

1244372020 is a wasteful number, since it uses less digits than its factorization.

1244372020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145507 (or 2145505 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 1244372020 is about 35275.6576125804. The cubic root of 1244372020 is about 1075.5982305746.

The spelling of 1244372020 in words is "one billion, two hundred forty-four million, three hundred seventy-two thousand, twenty".