1289486494 has 8 divisors (see below), whose sum is σ = 1979211960. Its totient is φ = 629749176.

The previous prime is 1289486453. The next prime is 1289486543. The reversal of 1289486494 is 4946849821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1289486494³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7496929 + ... + 7497100.

It is an arithmetic number, because the mean of its divisors is an integer number (247401495).

Almost surely, 2^1289486494 is an apocalyptic number.

1289486494 is a deficient number, since it is larger than the sum of its proper divisors (689725466).

1289486494 is a wasteful number, since it uses less digits than its factorization.

1289486494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994074.

The product of its digits is 3981312, while the sum is 55.

The square root of 1289486494 is about 35909.4206859426. The cubic root of 1289486494 is about 1088.4427708522.

The spelling of 1289486494 in words is "one billion, two hundred eighty-nine million, four hundred eighty-six thousand, four hundred ninety-four".