1171217628 has 72 divisors (see below), whose sum is σ = 3455542272. Its totient is φ = 327510432.

The previous prime is 1171217563. The next prime is 1171217639. The reversal of 1171217628 is 8267121711.

1171217628 is a `hidden beast` number, since 1 + 1 + 7 + 1 + 21 + 7 + 628 = 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 = 1171217592 and 1171217601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37600 + ... + 61287.

Almost surely, 2^1171217628 is an apocalyptic number.

1171217628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1171217628 is an abundant number, since it is smaller than the sum of its proper divisors (2284324644).

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

1171217628 is a wasteful number, since it uses less digits than its factorization.

1171217628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98951 (or 98946 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

The square root of 1171217628 is about 34223.0569645670. The cubic root of 1171217628 is about 1054.0936573252.

The spelling of 1171217628 in words is "one billion, one hundred seventy-one million, two hundred seventeen thousand, six hundred twenty-eight".