128863456 has 24 divisors (see below), whose sum is σ = 256556160. Its totient is φ = 63706368.

The previous prime is 128863439. The next prime is 128863463. The reversal of 128863456 is 654368821.

It is a congruent number.

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, 19776 + ... + 25471.

It is an arithmetic number, because the mean of its divisors is an integer number (10689840).

Almost surely, 2^128863456 is an apocalyptic number.

128863456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128863456 is a deficient number, since it is larger than the sum of its proper divisors (127692704).

128863456 is an equidigital number, since it uses as much as digits as its factorization.

128863456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45346 (or 45338 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 128863456 is about 11351.8040856949. The cubic root of 128863456 is about 505.0990963260.

The spelling of 128863456 in words is "one hundred twenty-eight million, eight hundred sixty-three thousand, four hundred fifty-six".