1153505978 has 8 divisors (see below), whose sum is σ = 1730613600. Its totient is φ = 576634780.

The previous prime is 1153505971. The next prime is 1153505987. The reversal of 1153505978 is 8795053511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1153505971) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46358 + ... + 66753.

It is an arithmetic number, because the mean of its divisors is an integer number (216326700).

Almost surely, 2^1153505978 is an apocalyptic number.

1153505978 is a deficient number, since it is larger than the sum of its proper divisors (577107622).

1153505978 is a wasteful number, since it uses less digits than its factorization.

1153505978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118212.

The product of its (nonzero) digits is 189000, while the sum is 44.

The square root of 1153505978 is about 33963.3034023488. The cubic root of 1153505978 is about 1048.7531618841.

The spelling of 1153505978 in words is "one billion, one hundred fifty-three million, five hundred five thousand, nine hundred seventy-eight".