1128345840 has 60 divisors (see below), whose sum is σ = 3789363864. Its totient is φ = 300892032.

The previous prime is 1128345797. The next prime is 1128345863. The reversal of 1128345840 is 485438211.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1128345795 and 1128345804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 782854 + ... + 784293.

Almost surely, 2^1128345840 is an apocalyptic number.

1128345840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128345840 is an abundant number, since it is smaller than the sum of its proper divisors (2661018024).

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

1128345840 is a wasteful number, since it uses less digits than its factorization.

1128345840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567166 (or 1567157 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1128345840 is about 33590.8594709930. The cubic root of 1128345840 is about 1041.0719470133.

The spelling of 1128345840 in words is "one billion, one hundred twenty-eight million, three hundred forty-five thousand, eight hundred forty".