1289056670 has 64 divisors (see below), whose sum is σ = 2627043840. Its totient is φ = 451113600.

The previous prime is 1289056669. The next prime is 1289056673. The reversal of 1289056670 is 766509821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289056673) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1565879 + ... + 1566701.

It is an arithmetic number, because the mean of its divisors is an integer number (41047560).

Almost surely, 2^1289056670 is an apocalyptic number.

1289056670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289056670 is an abundant number, since it is smaller than the sum of its proper divisors (1337987170).

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

1289056670 is a wasteful number, since it uses less digits than its factorization.

1289056670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1289056670 is about 35903.4353509521. The cubic root of 1289056670 is about 1088.3218206861.

The spelling of 1289056670 in words is "one billion, two hundred eighty-nine million, fifty-six thousand, six hundred seventy".