1128081864 has 64 divisors (see below), whose sum is σ = 3471027840. Its totient is φ = 297515520.

The previous prime is 1128081859. The next prime is 1128081887. The reversal of 1128081864 is 4681808211.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 256077 + ... + 260444.

It is an arithmetic number, because the mean of its divisors is an integer number (54234810).

Almost surely, 2^1128081864 is an apocalyptic number.

1128081864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1128081864 is an abundant number, since it is smaller than the sum of its proper divisors (2342945976).

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

1128081864 is a wasteful number, since it uses less digits than its factorization.

1128081864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516550 (or 516546 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 1128081864 is about 33586.9299579464. The cubic root of 1128081864 is about 1040.9907545772.

The spelling of 1128081864 in words is "one billion, one hundred twenty-eight million, eighty-one thousand, eight hundred sixty-four".