1128944471 has 6 divisors (see below), whose sum is σ = 1157153016. Its totient is φ = 1101407600.

The previous prime is 1128944461. The next prime is 1128944473. The reversal of 1128944471 is 1744498211.

It is not a de Polignac number, because 1128944471 - 2²² = 1124750167 is a prime.

It is a super-3 number, since 3×1128944471³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128944473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334115 + ... + 337476.

It is an arithmetic number, because the mean of its divisors is an integer number (192858836).

Almost surely, 2^1128944471 is an apocalyptic number.

1128944471 is a deficient number, since it is larger than the sum of its proper divisors (28208545).

1128944471 is an frugal number, since it uses more digits than its factorization.

1128944471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671673 (or 671632 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 1128944471 is about 33599.7689128958. The cubic root of 1128944471 is about 1041.2560240747.

The spelling of 1128944471 in words is "one billion, one hundred twenty-eight million, nine hundred forty-four thousand, four hundred seventy-one".