1289600080 has 40 divisors (see below), whose sum is σ = 3011807232. Its totient is φ = 513519744.

The previous prime is 1289600077. The next prime is 1289600083. The reversal of 1289600080 is 800069821.

It is an interprime number because it is at equal distance from previous prime (1289600077) and next prime (1289600083).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289600083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18304 + ... + 53983.

Almost surely, 2^1289600080 is an apocalyptic number.

1289600080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1289600080 is an abundant number, since it is smaller than the sum of its proper divisors (1722207152).

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

1289600080 is a wasteful number, since it uses less digits than its factorization.

1289600080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72523 (or 72517 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1289600080 is about 35911.0022138063. The cubic root of 1289600080 is about 1088.4747288528.

The spelling of 1289600080 in words is "one billion, two hundred eighty-nine million, six hundred thousand, eighty".