1129387356 has 18 divisors (see below), whose sum is σ = 2854840352. Its totient is φ = 376462440.

The previous prime is 1129387327. The next prime is 1129387361. The reversal of 1129387356 is 6537839211.

1129387356 is a `hidden beast` number, since 1 + 1 + 293 + 8 + 7 + 356 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 15685900 + ... + 15685971.

Almost surely, 2^1129387356 is an apocalyptic number.

It is an amenable number.

1129387356 is an abundant number, since it is smaller than the sum of its proper divisors (1725452996).

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

1129387356 is a wasteful number, since it uses less digits than its factorization.

1129387356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31371881 (or 31371876 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1129387356 is about 33606.3588625724. The cubic root of 1129387356 is about 1041.3921678784.

The spelling of 1129387356 in words is "one billion, one hundred twenty-nine million, three hundred eighty-seven thousand, three hundred fifty-six".