648909792 has 120 divisors (see below), whose sum is σ = 1933192800. Its totient is φ = 213497856.

The previous prime is 648909761. The next prime is 648909799. The reversal of 648909792 is 297909846.

648909792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648909799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 203184 + ... + 206352.

It is an arithmetic number, because the mean of its divisors is an integer number (16109940).

Almost surely, 2^648909792 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 648909792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966596400).

648909792 is an abundant number, since it is smaller than the sum of its proper divisors (1284283008).

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

648909792 is a wasteful number, since it uses less digits than its factorization.

648909792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 648909792 is about 25473.7078573183. The cubic root of 648909792 is about 865.7545364791.

Adding to 648909792 its sum of digits (54), we get a palindrome (648909846).

The spelling of 648909792 in words is "six hundred forty-eight million, nine hundred nine thousand, seven hundred ninety-two".