1247024028 has 48 divisors (see below), whose sum is σ = 3049998336. Its totient is φ = 395799360.

The previous prime is 1247024021. The next prime is 1247024039. The reversal of 1247024028 is 8204207421.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1247023986 and 1247024004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247024021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51418 + ... + 71678.

It is an arithmetic number, because the mean of its divisors is an integer number (63541632).

Almost surely, 2^1247024028 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 1247024028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524999168).

1247024028 is an abundant number, since it is smaller than the sum of its proper divisors (1802974308).

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

1247024028 is a wasteful number, since it uses less digits than its factorization.

1247024028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20514 (or 20512 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 1247024028 is about 35313.2273801192. The cubic root of 1247024028 is about 1076.3617940557.

The spelling of 1247024028 in words is "one billion, two hundred forty-seven million, twenty-four thousand, twenty-eight".