128278296 has 64 divisors (see below), whose sum is σ = 357458400. Its totient is φ = 42624000.

The previous prime is 128278273. The next prime is 128278307. The reversal of 128278296 is 692872821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85876 + ... + 87356.

Almost surely, 2^128278296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128278296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178729200).

128278296 is an abundant number, since it is smaller than the sum of its proper divisors (229180104).

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

128278296 is a wasteful number, since it uses less digits than its factorization.

128278296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1887 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 128278296 is about 11326.0008829242. Note that the first 3 decimals coincide. The cubic root of 128278296 is about 504.3333961897. Note that the first 4 decimals are identical.

The spelling of 128278296 in words is "one hundred twenty-eight million, two hundred seventy-eight thousand, two hundred ninety-six".