128622280 has 32 divisors (see below), whose sum is σ = 292219200. Its totient is φ = 50947776.

The previous prime is 128622271. The next prime is 128622281. The reversal of 128622280 is 82226821.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128622281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11490 + ... + 19729.

It is an arithmetic number, because the mean of its divisors is an integer number (9131850).

Almost surely, 2^128622280 is an apocalyptic number.

128622280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128622280 is an abundant number, since it is smaller than the sum of its proper divisors (163596920).

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

128622280 is a wasteful number, since it uses less digits than its factorization.

128622280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31333 (or 31329 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 128622280 is about 11341.1763058335. The cubic root of 128622280 is about 504.7837913795.

The spelling of 128622280 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, two hundred eighty".