1171276640 has 48 divisors (see below), whose sum is σ = 2791672128. Its totient is φ = 464357376.

The previous prime is 1171276637. The next prime is 1171276651. The reversal of 1171276640 is 466721711.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1171276640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14312 + ... + 50471.

It is an arithmetic number, because the mean of its divisors is an integer number (58159836).

Almost surely, 2^1171276640 is an apocalyptic number.

1171276640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171276640 is an abundant number, since it is smaller than the sum of its proper divisors (1620395488).

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

1171276640 is a wasteful number, since it uses less digits than its factorization.

1171276640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64911 (or 64903 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1171276640 is about 34223.9191209891. The cubic root of 1171276640 is about 1054.1113605907. Note that the first 3 decimals are identical.

The spelling of 1171276640 in words is "one billion, one hundred seventy-one million, two hundred seventy-six thousand, six hundred forty".