648930 has 32 divisors (see below), whose sum is σ = 1580544. Its totient is φ = 170496.

The previous prime is 648917. The next prime is 648931. The reversal of 648930 is 39846.

It is a super-2 number, since 2×648930² = 842220289800, which contains 22 as substring.

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

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648930.

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

648930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 2799 + ... + 3021.

It is an arithmetic number, because the mean of its divisors is an integer number (49392).

2⁶⁴⁸⁹³⁰ is an apocalyptic number.

648930 is an abundant number, since it is smaller than the sum of its proper divisors (931614).

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

648930 is a wasteful number, since it uses less digits than its factorization.

648930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 648930 is about 805.5619156837. The cubic root of 648930 is about 86.5763523340.

The spelling of 648930 in words is "six hundred forty-eight thousand, nine hundred thirty".