128877472 has 12 divisors (see below), whose sum is σ = 253727586. Its totient is φ = 64438720.

The previous prime is 128877457. The next prime is 128877491. The reversal of 128877472 is 274778821.

It can be written as a sum of positive squares in only one way, i.e., 69956496 + 58920976 = 8364^2 + 7676^2 .

It is a super-2 number, since 2×128877472² = 33218805578221568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2013679 + ... + 2013742.

Almost surely, 2^128877472 is an apocalyptic number.

It is an amenable number.

128877472 is a deficient number, since it is larger than the sum of its proper divisors (124850114).

128877472 is an equidigital number, since it uses as much as digits as its factorization.

128877472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027431 (or 4027423 counting only the distinct ones).

The product of its digits is 351232, while the sum is 46.

The square root of 128877472 is about 11352.4214157157. The cubic root of 128877472 is about 505.1174082470.

The spelling of 128877472 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, four hundred seventy-two".