1089149978 has 8 divisors (see below), whose sum is σ = 1867114272. Its totient is φ = 466778556.

The previous prime is 1089149959. The next prime is 1089149989. The reversal of 1089149978 is 8799419801.

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

It is a Curzon number.

It is an unprimeable number.

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, 38898200 + ... + 38898227.

It is an arithmetic number, because the mean of its divisors is an integer number (233389284).

Almost surely, 2^1089149978 is an apocalyptic number.

1089149978 is a deficient number, since it is larger than the sum of its proper divisors (777964294).

1089149978 is an equidigital number, since it uses as much as digits as its factorization.

1089149978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77796436.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The square root of 1089149978 is about 33002.2723157058. The cubic root of 1089149978 is about 1028.8748759798.

The spelling of 1089149978 in words is "one billion, eighty-nine million, one hundred forty-nine thousand, nine hundred seventy-eight".