1244651730 has 64 divisors (see below), whose sum is σ = 3428206848. Its totient is φ = 283299840.

The previous prime is 1244651729. The next prime is 1244651741. The reversal of 1244651730 is 371564421.

It is a junction number, because it is equal to n+sod(n) for n = 1244651691 and 1244651700.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38314 + ... + 62906.

It is an arithmetic number, because the mean of its divisors is an integer number (53565732).

Almost surely, 2^1244651730 is an apocalyptic number.

1244651730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244651730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714103424).

1244651730 is an abundant number, since it is smaller than the sum of its proper divisors (2183555118).

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

1244651730 is a wasteful number, since it uses less digits than its factorization.

1244651730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24851.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1244651730 is about 35279.6220217848. The cubic root of 1244651730 is about 1075.6788155436.

The spelling of 1244651730 in words is "one billion, two hundred forty-four million, six hundred fifty-one thousand, seven hundred thirty".