1188490945 has 16 divisors (see below), whose sum is σ = 1502239680. Its totient is φ = 900158400.

The previous prime is 1188490943. The next prime is 1188490967. The reversal of 1188490945 is 5490948811.

It is not a de Polignac number, because 1188490945 - 2¹ = 1188490943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1188490943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 187935 + ... + 194155.

It is an arithmetic number, because the mean of its divisors is an integer number (93889980).

Almost surely, 2^1188490945 is an apocalyptic number.

It is an amenable number.

1188490945 is a deficient number, since it is larger than the sum of its proper divisors (313748735).

1188490945 is a wasteful number, since it uses less digits than its factorization.

1188490945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8256.

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 1188490945 is about 34474.4970231619. The cubic root of 1188490945 is about 1059.2503733392.

The spelling of 1188490945 in words is "one billion, one hundred eighty-eight million, four hundred ninety thousand, nine hundred forty-five".