648634 has 16 divisors (see below), whose sum is σ = 1124928. Its totient is φ = 274752.

The previous prime is 648631. The next prime is 648649. The reversal of 648634 is 436846.

It is a junction number, because it is equal to n+sod(n) for n = 648596 and 648605.

It is not an unprimeable number, because it can be changed into a prime (648631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁶⁴⁸⁶³⁴ is an apocalyptic number.

648634 is a deficient number, since it is larger than the sum of its proper divisors (476294).

648634 is a wasteful number, since it uses less digits than its factorization.

648634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

The product of its digits is 13824, while the sum is 31.

The square root of 648634 is about 805.3781720409. The cubic root of 648634 is about 86.5631868166.

The spelling of 648634 in words is "six hundred forty-eight thousand, six hundred thirty-four".