1128940101 has 12 divisors (see below), whose sum is σ = 1686922380. Its totient is φ = 726673920.

The previous prime is 1128940093. The next prime is 1128940117. The reversal of 1128940101 is 1010498211.

It can be written as a sum of positive squares in 2 ways, for example, as 286489476 + 842450625 = 16926^2 + 29025^2 .

It is not a de Polignac number, because 1128940101 - 2³ = 1128940093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128940601) by changing a digit.

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, 2162460 + ... + 2162981.

It is an arithmetic number, because the mean of its divisors is an integer number (140576865).

Almost surely, 2^1128940101 is an apocalyptic number.

It is an amenable number.

1128940101 is a deficient number, since it is larger than the sum of its proper divisors (557982279).

1128940101 is a wasteful number, since it uses less digits than its factorization.

1128940101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325476 (or 4325473 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1128940101 is about 33599.7038826237. The cubic root of 1128940101 is about 1041.2546805499.

The spelling of 1128940101 in words is "one billion, one hundred twenty-eight million, nine hundred forty thousand, one hundred one".