1189857494 has 12 divisors (see below), whose sum is σ = 2076180084. Its totient is φ = 509938884.

The previous prime is 1189857481. The next prime is 1189857503. The reversal of 1189857494 is 4947589811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6070604 + ... + 6070799.

It is an arithmetic number, because the mean of its divisors is an integer number (173015007).

Almost surely, 2^1189857494 is an apocalyptic number.

1189857494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1189857494 is a deficient number, since it is larger than the sum of its proper divisors (886322590).

1189857494 is a wasteful number, since it uses less digits than its factorization.

1189857494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12141419 (or 12141412 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 56.

The square root of 1189857494 is about 34494.3110381987. The cubic root of 1189857494 is about 1059.6561997654.

The spelling of 1189857494 in words is "one billion, one hundred eighty-nine million, eight hundred fifty-seven thousand, four hundred ninety-four".