1128556319 has 16 divisors (see below), whose sum is σ = 1297658880. Its totient is φ = 970680960.

The previous prime is 1128556301. The next prime is 1128556321. The reversal of 1128556319 is 9136558211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128556319 is a prime.

It is a super-2 number, since 2×1128556319² = 2547278730309659522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128556379) 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, 177239 + ... + 183495.

It is an arithmetic number, because the mean of its divisors is an integer number (81103680).

Almost surely, 2^1128556319 is an apocalyptic number.

1128556319 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1128556319 is a deficient number, since it is larger than the sum of its proper divisors (169102561).

1128556319 is a wasteful number, since it uses less digits than its factorization.

1128556319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7150.

The product of its digits is 64800, while the sum is 41.

The square root of 1128556319 is about 33593.9923051727. The cubic root of 1128556319 is about 1041.1366760325.

The spelling of 1128556319 in words is "one billion, one hundred twenty-eight million, five hundred fifty-six thousand, three hundred nineteen".