648730 has 16 divisors (see below), whose sum is σ = 1208520. Its totient is φ = 250432.

The previous prime is 648719. The next prime is 648731. The reversal of 648730 is 37846.

648730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 594441 + 54289 = 771^2 + 233^2 .

It is a super-2 number, since 2×648730² = 841701225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829 + ... + 1408.

2⁶⁴⁸⁷³⁰ is an apocalyptic number.

648730 is a deficient number, since it is larger than the sum of its proper divisors (559790).

648730 is a wasteful number, since it uses less digits than its factorization.

648730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 648730 is about 805.4377691666. The cubic root of 648730 is about 86.5674571529.

It can be divided in two parts, 648 and 730, that added together give a triangular number (1378 = T₅₂).

The spelling of 648730 in words is "six hundred forty-eight thousand, seven hundred thirty".