1171230840 has 576 divisors, whose sum is σ = 4604221440. Its totient is φ = 266872320.

The previous prime is 1171230821. The next prime is 1171230877. The reversal of 1171230840 is 480321711.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 37781625 + ... + 37781655.

It is an arithmetic number, because the mean of its divisors is an integer number (7993440).

Almost surely, 2^1171230840 is an apocalyptic number.

1171230840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1171230840 is the 17112-nd decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171230840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2302110720).

1171230840 is an abundant number, since it is smaller than the sum of its proper divisors (3432990600).

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

1171230840 is a wasteful number, since it uses less digits than its factorization.

1171230840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1171230840 is about 34223.2499917819. The cubic root of 1171230840 is about 1054.0976209019.

The spelling of 1171230840 in words is "one billion, one hundred seventy-one million, two hundred thirty thousand, eight hundred forty".