1078489191 has 32 divisors (see below), whose sum is σ = 1632816640. Its totient is φ = 627709824.

The previous prime is 1078489189. The next prime is 1078489241. The reversal of 1078489191 is 1919848701.

It is not a de Polignac number, because 1078489191 - 2¹ = 1078489189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1078489191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078489591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 827046 + ... + 828348.

It is an arithmetic number, because the mean of its divisors is an integer number (51025520).

Almost surely, 2^1078489191 is an apocalyptic number.

1078489191 is a deficient number, since it is larger than the sum of its proper divisors (554327449).

1078489191 is a wasteful number, since it uses less digits than its factorization.

1078489191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 1078489191 is about 32840.3591789128. The cubic root of 1078489191 is about 1025.5069286271.

The spelling of 1078489191 in words is "one billion, seventy-eight million, four hundred eighty-nine thousand, one hundred ninety-one".