648936 has 24 divisors (see below), whose sum is σ = 1757730. Its totient is φ = 216288.

The previous prime is 648931. The next prime is 648937. The reversal of 648936 is 639846.

648936 is a `hidden beast` number, since 648 + 9 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 562500 + 86436 = 750^2 + 294^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×648936² = 842235864192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 648936.

It is not an unprimeable number, because it can be changed into a prime (648931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4435 + ... + 4578.

2⁶⁴⁸⁹³⁶ is an apocalyptic number.

It is an amenable number.

648936 is an abundant number, since it is smaller than the sum of its proper divisors (1108794).

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

648936 is a wasteful number, since it uses less digits than its factorization.

648936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9025 (or 9018 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 648936 is about 805.5656397836. The cubic root of 648936 is about 86.5766191612.

The spelling of 648936 in words is "six hundred forty-eight thousand, nine hundred thirty-six".