128788215 has 8 divisors (see below), whose sum is σ = 206061168. Its totient is φ = 68687040.

The previous prime is 128788193. The next prime is 128788241. The reversal of 128788215 is 512887821.

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

It is not a de Polignac number, because 128788215 - 2⁸ = 128787959 is a prime.

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, 4292926 + ... + 4292955.

It is an arithmetic number, because the mean of its divisors is an integer number (25757646).

Almost surely, 2^128788215 is an apocalyptic number.

128788215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128788215 is a deficient number, since it is larger than the sum of its proper divisors (77272953).

128788215 is an equidigital number, since it uses as much as digits as its factorization.

128788215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585889.

The product of its digits is 71680, while the sum is 42.

The square root of 128788215 is about 11348.4895470719. The cubic root of 128788215 is about 505.0007711650. Note that the first 3 decimals are identical.

The spelling of 128788215 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, two hundred fifteen".