1164247128 has 64 divisors (see below), whose sum is σ = 3528028800. Its totient is φ = 352801440.

The previous prime is 1164247127. The next prime is 1164247151. The reversal of 1164247128 is 8217424611.

It is a happy number.

1164247128 is a `hidden beast` number, since 1 + 1 + 642 + 4 + 7 + 1 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1164247092 and 1164247101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1164247121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242626 + ... + 247377.

It is an arithmetic number, because the mean of its divisors is an integer number (55125450).

Almost surely, 2^1164247128 is an apocalyptic number.

1164247128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1164247128 is an abundant number, since it is smaller than the sum of its proper divisors (2363781672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1164247128 is a wasteful number, since it uses less digits than its factorization.

1164247128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490029 (or 490019 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 1164247128 is about 34121.0657512335. The cubic root of 1164247128 is about 1051.9983494507.

The spelling of 1164247128 in words is "one billion, one hundred sixty-four million, two hundred forty-seven thousand, one hundred twenty-eight".