1289498896 has 40 divisors (see below), whose sum is σ = 2913603200. Its totient is φ = 552640032.

The previous prime is 1289498879. The next prime is 1289498911. The reversal of 1289498896 is 6988949821.

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, 111996 + ... + 122971.

It is an arithmetic number, because the mean of its divisors is an integer number (72840080).

Almost surely, 2^1289498896 is an apocalyptic number.

1289498896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1289498896 is an abundant number, since it is smaller than the sum of its proper divisors (1624104304).

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

1289498896 is an equidigital number, since it uses as much as digits as its factorization.

1289498896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234996 (or 234976 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 64.

The square root of 1289498896 is about 35909.5933700174. The cubic root of 1289498896 is about 1088.4462603094.

The spelling of 1289498896 in words is "one billion, two hundred eighty-nine million, four hundred ninety-eight thousand, eight hundred ninety-six".