128822472 has 24 divisors (see below), whose sum is σ = 348894390. Its totient is φ = 42940800.

The previous prime is 128822467. The next prime is 128822497. The reversal of 128822472 is 274228821.

It can be written as a sum of positive squares in only one way, i.e., 105144516 + 23677956 = 10254^2 + 4866^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 894529 + ... + 894672.

Almost surely, 2^128822472 is an apocalyptic number.

128822472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128822472 is an abundant number, since it is smaller than the sum of its proper divisors (220071918).

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

128822472 is a wasteful number, since it uses less digits than its factorization.

128822472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789213 (or 1789206 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 128822472 is about 11349.9987665198. The cubic root of 128822472 is about 505.0455430612.

The spelling of 128822472 in words is "one hundred twenty-eight million, eight hundred twenty-two thousand, four hundred seventy-two".