1128057644 has 48 divisors (see below), whose sum is σ = 2392229952. Its totient is φ = 454367232.

The previous prime is 1128057613. The next prime is 1128057649. The reversal of 1128057644 is 4467508211.

It is a junction number, because it is equal to n+sod(n) for n = 1128057598 and 1128057607.

It is not an unprimeable number, because it can be changed into a prime (1128057649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473384 + ... + 475760.

It is an arithmetic number, because the mean of its divisors is an integer number (49838124).

Almost surely, 2^1128057644 is an apocalyptic number.

1128057644 is a gapful number since it is divisible by the number (14) 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 1128057644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196114976).

1128057644 is an abundant number, since it is smaller than the sum of its proper divisors (1264172308).

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

1128057644 is a wasteful number, since it uses less digits than its factorization.

1128057644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1128057644 is about 33586.5693990917. The cubic root of 1128057644 is about 1040.9833044747.

The spelling of 1128057644 in words is "one billion, one hundred twenty-eight million, fifty-seven thousand, six hundred forty-four".