1289641296 has 20 divisors (see below), whose sum is σ = 3331573472. Its totient is φ = 429880416.

The previous prime is 1289641291. The next prime is 1289641459. The reversal of 1289641296 is 6921469821.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 26867527 = 1289641296 / (1 + 2 + 8 + 9 + 6 + 4 + 1 + 2 + 9 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289641291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13433716 + ... + 13433811.

Almost surely, 2^1289641296 is an apocalyptic number.

1289641296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1289641296 is an abundant number, since it is smaller than the sum of its proper divisors (2041932176).

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

1289641296 is a wasteful number, since it uses less digits than its factorization.

1289641296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26867538 (or 26867532 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 1289641296 is about 35911.5760723475. The cubic root of 1289641296 is about 1088.4863247207.

The spelling of 1289641296 in words is "one billion, two hundred eighty-nine million, six hundred forty-one thousand, two hundred ninety-six".