1128509680 has 20 divisors (see below), whose sum is σ = 2623785192. Its totient is φ = 451403840.

The previous prime is 1128509639. The next prime is 1128509773. The reversal of 1128509680 is 869058211.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7053106 + ... + 7053265.

Almost surely, 2^1128509680 is an apocalyptic number.

1128509680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128509680 is an abundant number, since it is smaller than the sum of its proper divisors (1495275512).

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

1128509680 is a wasteful number, since it uses less digits than its factorization.

1128509680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106384 (or 14106378 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 1128509680 is about 33593.2981411471. The cubic root of 1128509680 is about 1041.1223337436.

The spelling of 1128509680 in words is "one billion, one hundred twenty-eight million, five hundred nine thousand, six hundred eighty".