1289584652 has 12 divisors (see below), whose sum is σ = 2293769856. Its totient is φ = 634221840.

The previous prime is 1289584649. The next prime is 1289584661. The reversal of 1289584652 is 2564859821.

It is a happy number.

It is a super-2 number, since 2×1289584652² = 3326057149347922208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1289584652.

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, 2642348 + ... + 2642835.

It is an arithmetic number, because the mean of its divisors is an integer number (191147488).

Almost surely, 2^1289584652 is an apocalyptic number.

It is an amenable number.

1289584652 is a deficient number, since it is larger than the sum of its proper divisors (1004185204).

1289584652 is a wasteful number, since it uses less digits than its factorization.

1289584652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285248 (or 5285246 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The square root of 1289584652 is about 35910.7874043441. The cubic root of 1289584652 is about 1088.4703882165.

The spelling of 1289584652 in words is "one billion, two hundred eighty-nine million, five hundred eighty-four thousand, six hundred fifty-two".