1288235456 has 14 divisors (see below), whose sum is σ = 2556342360. Its totient is φ = 644117696.

The previous prime is 1288235449. The next prime is 1288235461. The reversal of 1288235456 is 6545328821.

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 as a sum of consecutive naturals, namely, 10064276 + ... + 10064403.

Almost surely, 2^1288235456 is an apocalyptic number.

1288235456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1288235456 is a deficient number, since it is larger than the sum of its proper divisors (1268106904).

1288235456 is an equidigital number, since it uses as much as digits as its factorization.

1288235456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20128691 (or 20128681 counting only the distinct ones).

The product of its digits is 460800, while the sum is 44.

The square root of 1288235456 is about 35891.9971024182. The cubic root of 1288235456 is about 1088.0906606978.

The spelling of 1288235456 in words is "one billion, two hundred eighty-eight million, two hundred thirty-five thousand, four hundred fifty-six".