1289079132 has 24 divisors (see below), whose sum is σ = 3281292672. Its totient is φ = 390630000.

The previous prime is 1289079089. The next prime is 1289079151. The reversal of 1289079132 is 2319709821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4882744 + ... + 4883007.

It is an arithmetic number, because the mean of its divisors is an integer number (136720528).

Almost surely, 2^1289079132 is an apocalyptic number.

1289079132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1289079132 is an abundant number, since it is smaller than the sum of its proper divisors (1992213540).

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

1289079132 is a wasteful number, since it uses less digits than its factorization.

1289079132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765769 (or 9765767 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1289079132 is about 35903.7481608815. The cubic root of 1289079132 is about 1088.3281420381.

The spelling of 1289079132 in words is "one billion, two hundred eighty-nine million, seventy-nine thousand, one hundred thirty-two".