648090 has 48 divisors (see below), whose sum is σ = 1778400. Its totient is φ = 163296.

The previous prime is 648079. The next prime is 648097. The reversal of 648090 is 90846.

648090 is nontrivially palindromic in base 8.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648090.

It is not an unprimeable number, because it can be changed into a prime (648097) 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 23 ways as a sum of consecutive naturals, for example, 1521 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (37050).

2⁶⁴⁸⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889200).

648090 is an abundant number, since it is smaller than the sum of its proper divisors (1130310).

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

648090 is a wasteful number, since it uses less digits than its factorization.

648090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 648090 is about 805.0403716585. The cubic root of 648090 is about 86.5389802818.

The spelling of 648090 in words is "six hundred forty-eight thousand, ninety".