128037856 has 12 divisors (see below), whose sum is σ = 252074592. Its totient is φ = 64018912.

The previous prime is 128037851. The next prime is 128037881. The reversal of 128037856 is 658730821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128037851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000560 + ... + 2000623.

It is an arithmetic number, because the mean of its divisors is an integer number (21006216).

Almost surely, 2^128037856 is an apocalyptic number.

128037856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128037856 is a deficient number, since it is larger than the sum of its proper divisors (124036736).

128037856 is an equidigital number, since it uses as much as digits as its factorization.

128037856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001193 (or 4001185 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 128037856 is about 11315.3813899488. The cubic root of 128037856 is about 504.0180979476.

The spelling of 128037856 in words is "one hundred twenty-eight million, thirty-seven thousand, eight hundred fifty-six".