1171628028 has 18 divisors (see below), whose sum is σ = 2961615384. Its totient is φ = 390542664.

The previous prime is 1171628021. The next prime is 1171628033. The reversal of 1171628028 is 8208261711.

1171628028 is a `hidden beast` number, since 1 + 1 + 7 + 1 + 628 + 0 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 32545223 = 1171628028 / (1 + 1 + 7 + 1 + 6 + 2 + 8 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1171627983 and 1171628001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171628021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16272576 + ... + 16272647.

It is an arithmetic number, because the mean of its divisors is an integer number (164534188).

Almost surely, 2^1171628028 is an apocalyptic number.

1171628028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1171628028 is an abundant number, since it is smaller than the sum of its proper divisors (1789987356).

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

1171628028 is a wasteful number, since it uses less digits than its factorization.

1171628028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32545233 (or 32545228 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1171628028 is about 34229.0523970501. The cubic root of 1171628028 is about 1054.2167626895.

Adding to 1171628028 its reverse (8208261711), we get a palindrome (9379889739).

The spelling of 1171628028 in words is "one billion, one hundred seventy-one million, six hundred twenty-eight thousand, twenty-eight".