1289104896 has 40 divisors (see below), whose sum is σ = 3434260104. Its totient is φ = 429701120.

The previous prime is 1289104879. The next prime is 1289104907. The reversal of 1289104896 is 6984019821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418095 + ... + 421166.

Almost surely, 2^1289104896 is an apocalyptic number.

1289104896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1289104896 is an abundant number, since it is smaller than the sum of its proper divisors (2145155208).

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

1289104896 is an frugal number, since it uses more digits than its factorization.

1289104896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839282 (or 839266 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 1289104896 is about 35904.1069517124. The cubic root of 1289104896 is about 1088.3353925626.

The spelling of 1289104896 in words is "one billion, two hundred eighty-nine million, one hundred four thousand, eight hundred ninety-six".