1187958385 has 8 divisors (see below), whose sum is σ = 1509406056. Its totient is φ = 894462720.

The previous prime is 1187958379. The next prime is 1187958389. The reversal of 1187958385 is 5838597811.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18249984 + 1169708401 = 4272^2 + 34201^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1187958385 is a prime.

It is a super-2 number, since 2×1187958385² = 2822490248983616450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187958389) 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 7 ways as a sum of consecutive naturals, for example, 6987906 + ... + 6988075.

It is an arithmetic number, because the mean of its divisors is an integer number (188675757).

Almost surely, 2^1187958385 is an apocalyptic number.

It is an amenable number.

1187958385 is a deficient number, since it is larger than the sum of its proper divisors (321447671).

1187958385 is a wasteful number, since it uses less digits than its factorization.

1187958385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13976003.

The product of its digits is 2419200, while the sum is 55.

The square root of 1187958385 is about 34466.7721871370. The cubic root of 1187958385 is about 1059.0921338334.

The spelling of 1187958385 in words is "one billion, one hundred eighty-seven million, nine hundred fifty-eight thousand, three hundred eighty-five".