1244454220 has 24 divisors (see below), whose sum is σ = 2630006064. Its totient is φ = 494609856.

The previous prime is 1244454217. The next prime is 1244454223. The reversal of 1244454220 is 224544421.

It is an interprime number because it is at equal distance from previous prime (1244454217) and next prime (1244454223).

It is not an unprimeable number, because it can be changed into a prime (1244454223) 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, 195022 + ... + 201301.

It is an arithmetic number, because the mean of its divisors is an integer number (109583586).

Almost surely, 2^1244454220 is an apocalyptic number.

1244454220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244454220 is an abundant number, since it is smaller than the sum of its proper divisors (1385551844).

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

1244454220 is a wasteful number, since it uses less digits than its factorization.

1244454220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396489 (or 396487 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 1244454220 is about 35276.8227027322. The cubic root of 1244454220 is about 1075.6219137997.

Adding to 1244454220 its reverse (224544421), we get a palindrome (1468998641).

The spelling of 1244454220 in words is "one billion, two hundred forty-four million, four hundred fifty-four thousand, two hundred twenty".