648715730 has 16 divisors (see below), whose sum is σ = 1257510744. Its totient is φ = 239525760.

The previous prime is 648715723. The next prime is 648715807. The reversal of 648715730 is 37517846.

It can be written as a sum of positive squares in 4 ways, for example, as 165199609 + 483516121 = 12853^2 + 21989^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2494931 + ... + 2495190.

Almost surely, 2^648715730 is an apocalyptic number.

648715730 is a deficient number, since it is larger than the sum of its proper divisors (608795014).

648715730 is a wasteful number, since it uses less digits than its factorization.

648715730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990141.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 648715730 is about 25469.8985078465. The cubic root of 648715730 is about 865.6682241185.

The spelling of 648715730 in words is "six hundred forty-eight million, seven hundred fifteen thousand, seven hundred thirty".