648831 has 8 divisors (see below), whose sum is σ = 910720. Its totient is φ = 409752.

The previous prime is 648803. The next prime is 648841. The reversal of 648831 is 138846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648831 - 2¹⁴ = 632447 is a prime.

It is a super-2 number, since 2×648831² = 841963333122, which contains 22 as substring.

It is the 806-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648841) by changing a digit.

It is a nontrivial repunit in base 805.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5635 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (113840).

2⁶⁴⁸⁸³¹ is an apocalyptic number.

648831 is a deficient number, since it is larger than the sum of its proper divisors (261889).

648831 is a wasteful number, since it uses less digits than its factorization.

648831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11405.

The product of its digits is 4608, while the sum is 30.

The square root of 648831 is about 805.5004655492. The cubic root of 648831 is about 86.5719494478.

The spelling of 648831 in words is "six hundred forty-eight thousand, eight hundred thirty-one".