1209064648 has 64 divisors (see below), whose sum is σ = 2514758400. Its totient is φ = 540395520.

The previous prime is 1209064643. The next prime is 1209064711. The reversal of 1209064648 is 8464609021.

It is a self number, because there is not a number n which added to its sum of digits gives 1209064648.

It is not an unprimeable number, because it can be changed into a prime (1209064643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1681233 + ... + 1681951.

It is an arithmetic number, because the mean of its divisors is an integer number (39293100).

Almost surely, 2^1209064648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209064648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257379200).

1209064648 is an abundant number, since it is smaller than the sum of its proper divisors (1305693752).

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

1209064648 is a wasteful number, since it uses less digits than its factorization.

1209064648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1209064648 is about 34771.6069228904. The cubic root of 1209064648 is about 1065.3275893508.

The spelling of 1209064648 in words is "one billion, two hundred nine million, sixty-four thousand, six hundred forty-eight".