1154943992 has 8 divisors (see below), whose sum is σ = 2165520000. Its totient is φ = 577471992.

The previous prime is 1154943991. The next prime is 1154944003. The reversal of 1154943992 is 2993494511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154943991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72183992 + ... + 72184007.

It is an arithmetic number, because the mean of its divisors is an integer number (270690000).

Almost surely, 2^1154943992 is an apocalyptic number.

It is an amenable number.

1154943992 is a deficient number, since it is larger than the sum of its proper divisors (1010576008).

1154943992 is a wasteful number, since it uses less digits than its factorization.

1154943992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144368005 (or 144368001 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 1154943992 is about 33984.4669224044. The cubic root of 1154943992 is about 1049.1887890051.

The spelling of 1154943992 in words is "one billion, one hundred fifty-four million, nine hundred forty-three thousand, nine hundred ninety-two".