648470 has 16 divisors (see below), whose sum is σ = 1229040. Its totient is φ = 245664.

The previous prime is 648449. The next prime is 648481. The reversal of 648470 is 74846.

648470 = T₁₁₆ + T₁₁₇ + ... + T₁₇₅.

648470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648470.

It is an unprimeable number.

648470 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (76815).

2⁶⁴⁸⁴⁷⁰ is an apocalyptic number.

648470 is a deficient number, since it is larger than the sum of its proper divisors (580570).

648470 is a wasteful number, since it uses less digits than its factorization.

648470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 648470 is about 805.2763500811. The cubic root of 648470 is about 86.5558906838. Note that the first 3 decimals are identical.

The spelling of 648470 in words is "six hundred forty-eight thousand, four hundred seventy".