1155445992 has 32 divisors (see below), whose sum is σ = 3209572800. Its totient is φ = 385148592.

The previous prime is 1155445943. The next prime is 1155445997. The reversal of 1155445992 is 2995445511.

1155445992 is a `hidden beast` number, since 1 + 1 + 5 + 54 + 4 + 599 + 2 = 666.

1155445992 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1155445997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2674428 + ... + 2674859.

It is an arithmetic number, because the mean of its divisors is an integer number (100299150).

Almost surely, 2^1155445992 is an apocalyptic number.

1155445992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155445992 is an abundant number, since it is smaller than the sum of its proper divisors (2054126808).

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

1155445992 is a wasteful number, since it uses less digits than its factorization.

1155445992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349302 (or 5349292 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 1155445992 is about 33991.8518471707. The cubic root of 1155445992 is about 1049.3407780437.

The spelling of 1155445992 in words is "one billion, one hundred fifty-five million, four hundred forty-five thousand, nine hundred ninety-two".