1155438207 has 48 divisors (see below), whose sum is σ = 2084828928. Its totient is φ = 599063040.

The previous prime is 1155438199. The next prime is 1155438217. The reversal of 1155438207 is 7028345511.

1155438207 is a `hidden beast` number, since 1 + 15 + 5 + 438 + 207 = 666.

It is not a de Polignac number, because 1155438207 - 2³ = 1155438199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155438217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 444303 + ... + 446895.

It is an arithmetic number, because the mean of its divisors is an integer number (43433936).

Almost surely, 2^1155438207 is an apocalyptic number.

1155438207 is a deficient number, since it is larger than the sum of its proper divisors (929390721).

1155438207 is a wasteful number, since it uses less digits than its factorization.

1155438207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260 (or 3257 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1155438207 is about 33991.7373342405. The cubic root of 1155438207 is about 1049.3384213387.

The spelling of 1155438207 in words is "one billion, one hundred fifty-five million, four hundred thirty-eight thousand, two hundred seven".