648570 has 32 divisors (see below), whose sum is σ = 1677312. Its totient is φ = 159552.

The previous prime is 648563. The next prime is 648607. The reversal of 648570 is 75846.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

648570 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 15 ways as a sum of consecutive naturals, for example, 442 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (52416).

2⁶⁴⁸⁵⁷⁰ is an apocalyptic number.

648570 is an abundant number, since it is smaller than the sum of its proper divisors (1028742).

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

648570 is a wasteful number, since it uses less digits than its factorization.

648570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 648570 is about 805.3384381737. The cubic root of 648570 is about 86.5603396916.

It can be divided in two parts, 6485 and 70, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 648570 in words is "six hundred forty-eight thousand, five hundred seventy".