1028120247 has 48 divisors (see below), whose sum is σ = 1876962048. Its totient is φ = 526746240.

The previous prime is 1028120231. The next prime is 1028120251. The reversal of 1028120247 is 7420218201.

It is not a de Polignac number, because 1028120247 - 2⁴ = 1028120231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1028120247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028120207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40428 + ... + 60750.

It is an arithmetic number, because the mean of its divisors is an integer number (39103376).

Almost surely, 2^1028120247 is an apocalyptic number.

1028120247 is a deficient number, since it is larger than the sum of its proper divisors (848841801).

1028120247 is a wasteful number, since it uses less digits than its factorization.

1028120247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20420 (or 20417 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1028120247 is about 32064.3142293734. The cubic root of 1028120247 is about 1009.2869021278.

Adding to 1028120247 its reverse (7420218201), we get a palindrome (8448338448).

The spelling of 1028120247 in words is "one billion, twenty-eight million, one hundred twenty thousand, two hundred forty-seven".