1188628257 has 8 divisors (see below), whose sum is σ = 1635961600. Its totient is φ = 766856880.

The previous prime is 1188628241. The next prime is 1188628291. The reversal of 1188628257 is 7528268811.

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

It is not a de Polignac number, because 1188628257 - 2⁴ = 1188628241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1188628157) 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 7 ways as a sum of consecutive naturals, for example, 6390382 + ... + 6390567.

It is an arithmetic number, because the mean of its divisors is an integer number (204495200).

Almost surely, 2^1188628257 is an apocalyptic number.

It is an amenable number.

1188628257 is a deficient number, since it is larger than the sum of its proper divisors (447333343).

1188628257 is a wasteful number, since it uses less digits than its factorization.

1188628257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12780983.

The product of its digits is 430080, while the sum is 48.

The square root of 1188628257 is about 34476.4884667798. The cubic root of 1188628257 is about 1059.2911651760.

The spelling of 1188628257 in words is "one billion, one hundred eighty-eight million, six hundred twenty-eight thousand, two hundred fifty-seven".