1128278256 has 80 divisors (see below), whose sum is σ = 3348738048. Its totient is φ = 320659200.

The previous prime is 1128278227. The next prime is 1128278269. The reversal of 1128278256 is 6528728211.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 55386 + ... + 72966.

Almost surely, 2^1128278256 is an apocalyptic number.

1128278256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128278256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1674369024).

1128278256 is an abundant number, since it is smaller than the sum of its proper divisors (2220459792).

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

1128278256 is a wasteful number, since it uses less digits than its factorization.

1128278256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17790 (or 17784 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 1128278256 is about 33589.8534679745. The cubic root of 1128278256 is about 1041.0511610660.

The spelling of 1128278256 in words is "one billion, one hundred twenty-eight million, two hundred seventy-eight thousand, two hundred fifty-six".