648392 has 8 divisors (see below), whose sum is σ = 1215750. Its totient is φ = 324192.

The previous prime is 648391. The next prime is 648433. The reversal of 648392 is 293846.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 17956 = 794^2 + 134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648392.

It is not an unprimeable number, because it can be changed into a prime (648391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40517 + ... + 40532.

2⁶⁴⁸³⁹² is an apocalyptic number.

It is an amenable number.

648392 is a deficient number, since it is larger than the sum of its proper divisors (567358).

648392 is a wasteful number, since it uses less digits than its factorization.

648392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81055 (or 81051 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 648392 is about 805.2279180456. The cubic root of 648392 is about 86.5524201403.

It can be divided in two parts, 648 and 392, that multiplied together give a square (254016 = 504²).

The spelling of 648392 in words is "six hundred forty-eight thousand, three hundred ninety-two".