1173968640 has 540 divisors, whose sum is σ = 4616549784. Its totient is φ = 284663808.

The previous prime is 1173968591. The next prime is 1173968647. The reversal of 1173968640 is 468693711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173968647) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 17521887 + ... + 17521953.

Almost surely, 2^1173968640 is an apocalyptic number.

1173968640 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 1173968640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2308274892).

1173968640 is an abundant number, since it is smaller than the sum of its proper divisors (3442581144).

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

1173968640 is an equidigital number, since it uses as much as digits as its factorization.

1173968640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1173968640 is about 34263.2257675777. The cubic root of 1173968640 is about 1054.9183138689.

The spelling of 1173968640 in words is "one billion, one hundred seventy-three million, nine hundred sixty-eight thousand, six hundred forty".