1289739472 has 40 divisors (see below), whose sum is σ = 2894991296. Its totient is φ = 545170176.

The previous prime is 1289739461. The next prime is 1289739487. The reversal of 1289739472 is 2749379821.

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, 70698 + ... + 87049.

Almost surely, 2^1289739472 is an apocalyptic number.

It is an amenable number.

1289739472 is an abundant number, since it is smaller than the sum of its proper divisors (1605251824).

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

1289739472 is a wasteful number, since it uses less digits than its factorization.

1289739472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157835 (or 157829 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 1289739472 is about 35912.9429593287. The cubic root of 1289739472 is about 1088.5139449389.

The spelling of 1289739472 in words is "one billion, two hundred eighty-nine million, seven hundred thirty-nine thousand, four hundred seventy-two".