1188239745 has 64 divisors (see below), whose sum is σ = 2375847936. Its totient is φ = 492660480.

The previous prime is 1188239743. The next prime is 1188239747. The reversal of 1188239745 is 5479328811.

It is an interprime number because it is at equal distance from previous prime (1188239743) and next prime (1188239747).

It is not a de Polignac number, because 1188239745 - 2¹ = 1188239743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1188239694 and 1188239703.

It is not an unprimeable number, because it can be changed into a prime (1188239743) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 642412 + ... + 644258.

It is an arithmetic number, because the mean of its divisors is an integer number (37122624).

Almost surely, 2^1188239745 is an apocalyptic number.

1188239745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1188239745 is a deficient number, since it is larger than the sum of its proper divisors (1187608191).

1188239745 is a wasteful number, since it uses less digits than its factorization.

1188239745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430.

The product of its digits is 483840, while the sum is 48.

The square root of 1188239745 is about 34470.8535577522. The cubic root of 1188239745 is about 1059.1757401966.

The spelling of 1188239745 in words is "one billion, one hundred eighty-eight million, two hundred thirty-nine thousand, seven hundred forty-five".