1247673744 has 90 divisors (see below), whose sum is σ = 3589242930. Its totient is φ = 404587008.

The previous prime is 1247673731. The next prime is 1247673769. The reversal of 1247673744 is 4473767421.

It can be written as a sum of positive squares in 3 ways, for example, as 867891600 + 379782144 = 29460^2 + 19488^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1247673744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 193972 + ... + 200300.

It is an arithmetic number, because the mean of its divisors is an integer number (39880477).

Almost surely, 2^1247673744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247673744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1794621465).

1247673744 is an abundant number, since it is smaller than the sum of its proper divisors (2341569186).

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

1247673744 is a wasteful number, since it uses less digits than its factorization.

1247673744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6417 (or 6371 counting only the distinct ones).

The product of its digits is 790272, while the sum is 45.

The square root of 1247673744 is about 35322.4255112811. The cubic root of 1247673744 is about 1076.5486945071.

The spelling of 1247673744 in words is "one billion, two hundred forty-seven million, six hundred seventy-three thousand, seven hundred forty-four".