128278084 has 24 divisors (see below), whose sum is σ = 255544128. Its totient is φ = 55772640.

The previous prime is 128278079. The next prime is 128278097. The reversal of 128278084 is 480872821.

It is a super-2 number, since 2×128278084² = 32910533669422112, which contains 22 as substring.

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, 62367 + ... + 64390.

It is an arithmetic number, because the mean of its divisors is an integer number (10647672).

Almost surely, 2^128278084 is an apocalyptic number.

It is an amenable number.

128278084 is a deficient number, since it is larger than the sum of its proper divisors (127266044).

128278084 is a wasteful number, since it uses less digits than its factorization.

128278084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126795 (or 126793 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 128278084 is about 11325.9915239241. The cubic root of 128278084 is about 504.3331183595. Note that the first 3 decimals are identical.

The spelling of 128278084 in words is "one hundred twenty-eight million, two hundred seventy-eight thousand, eighty-four".