1289361248 has 48 divisors (see below), whose sum is σ = 2931020064. Its totient is φ = 546877440.

The previous prime is 1289361239. The next prime is 1289361289. The reversal of 1289361248 is 8421639821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1289361199 and 1289361208.

It is a congruent number.

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, 7943 + ... + 51398.

It is an arithmetic number, because the mean of its divisors is an integer number (61062918).

Almost surely, 2^1289361248 is an apocalyptic number.

It is an amenable number.

1289361248 is an abundant number, since it is smaller than the sum of its proper divisors (1641658816).

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

1289361248 is an equidigital number, since it uses as much as digits as its factorization.

1289361248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59455 (or 59447 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 1289361248 is about 35907.6767279645. The cubic root of 1289361248 is about 1088.4075300754.

The spelling of 1289361248 in words is "one billion, two hundred eighty-nine million, three hundred sixty-one thousand, two hundred forty-eight".