648929880 has 160 divisors (see below), whose sum is σ = 2222866800. Its totient is φ = 169737984.

The previous prime is 648929863. The next prime is 648929887. The reversal of 648929880 is 88929846.

648929880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×648929880² = 842219978313628800, which contains 22 as substring.

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 (648929887) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 169831 + ... + 173609.

Almost surely, 2^648929880 is an apocalyptic number.

648929880 is a gapful number since it is divisible by the number (60) 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 648929880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111433400).

648929880 is an abundant number, since it is smaller than the sum of its proper divisors (1573936920).

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

648929880 is a wasteful number, since it uses less digits than its factorization.

648929880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 648929880 is about 25474.1021431571. The cubic root of 648929880 is about 865.7634699744.

The spelling of 648929880 in words is "six hundred forty-eight million, nine hundred twenty-nine thousand, eight hundred eighty".