1153947918 has 16 divisors (see below), whose sum is σ = 2312121600. Its totient is φ = 383945016.

The previous prime is 1153947869. The next prime is 1153947931. The reversal of 1153947918 is 8197493511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172518 + ... + 179081.

It is an arithmetic number, because the mean of its divisors is an integer number (144507600).

Almost surely, 2^1153947918 is an apocalyptic number.

1153947918 is an abundant number, since it is smaller than the sum of its proper divisors (1158173682).

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

1153947918 is a wasteful number, since it uses less digits than its factorization.

1153947918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352151.

The product of its digits is 272160, while the sum is 48.

The square root of 1153947918 is about 33969.8089190976. The cubic root of 1153947918 is about 1048.8870802173.

The spelling of 1153947918 in words is "one billion, one hundred fifty-three million, nine hundred forty-seven thousand, nine hundred eighteen".