1247328444 has 12 divisors (see below), whose sum is σ = 2910433064. Its totient is φ = 415776144.

The previous prime is 1247328409. The next prime is 1247328461. The reversal of 1247328444 is 4448237421.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1247328444² = 3111656494422922272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51972007 + ... + 51972030.

Almost surely, 2^1247328444 is an apocalyptic number.

It is an amenable number.

1247328444 is an abundant number, since it is smaller than the sum of its proper divisors (1663104620).

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

1247328444 is a wasteful number, since it uses less digits than its factorization.

1247328444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103944044 (or 103944042 counting only the distinct ones).

The product of its digits is 172032, while the sum is 39.

The square root of 1247328444 is about 35317.5373433653. The cubic root of 1247328444 is about 1076.4493719173.

The spelling of 1247328444 in words is "one billion, two hundred forty-seven million, three hundred twenty-eight thousand, four hundred forty-four".