1171062640 has 80 divisors (see below), whose sum is σ = 3012235776. Its totient is φ = 419820800.

The previous prime is 1171062631. The next prime is 1171062643. The reversal of 1171062640 is 462601711.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1171062599 and 1171062608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171062643) 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, 53109 + ... + 71851.

Almost surely, 2^1171062640 is an apocalyptic number.

1171062640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171062640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506117888).

1171062640 is an abundant number, since it is smaller than the sum of its proper divisors (1841173136).

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

1171062640 is a wasteful number, since it uses less digits than its factorization.

1171062640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18838 (or 18832 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1171062640 is about 34220.7925098178. The cubic root of 1171062640 is about 1054.0471589714.

The spelling of 1171062640 in words is "one billion, one hundred seventy-one million, sixty-two thousand, six hundred forty".