648566730 has 128 divisors (see below), whose sum is σ = 2044915200. Its totient is φ = 143119872.

The previous prime is 648566713. The next prime is 648566761. The reversal of 648566730 is 37665846.

648566730 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-3 number, since 3×648566730³ (a number of 27 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48894 + ... + 60726.

It is an arithmetic number, because the mean of its divisors is an integer number (15975900).

Almost surely, 2^648566730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648566730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022457600).

648566730 is an abundant number, since it is smaller than the sum of its proper divisors (1396348470).

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

648566730 is a wasteful number, since it uses less digits than its factorization.

648566730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11885 (or 11879 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 648566730 is about 25466.9733183981. The cubic root of 648566730 is about 865.6019421628.

The spelling of 648566730 in words is "six hundred forty-eight million, five hundred sixty-six thousand, seven hundred thirty".