1173620646 has 48 divisors (see below), whose sum is σ = 2794034880. Its totient is φ = 353075760.

The previous prime is 1173620639. The next prime is 1173620647. The reversal of 1173620646 is 6460263711.

It is a happy number.

1173620646 is a `hidden beast` number, since 1 + 1 + 7 + 3 + 6 + 2 + 0 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1173620646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173620647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6201 + ... + 48843.

It is an arithmetic number, because the mean of its divisors is an integer number (58209060).

Almost surely, 2^1173620646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1173620646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397017440).

1173620646 is an abundant number, since it is smaller than the sum of its proper divisors (1620414234).

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

1173620646 is a wasteful number, since it uses less digits than its factorization.

1173620646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42801 (or 42798 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1173620646 is about 34258.1471477954. The cubic root of 1173620646 is about 1054.8140687439.

The spelling of 1173620646 in words is "one billion, one hundred seventy-three million, six hundred twenty thousand, six hundred forty-six".