649726 has 16 divisors (see below), whose sum is σ = 1215360. Its totient is φ = 253080.

The previous prime is 649717. The next prime is 649739. The reversal of 649726 is 627946.

It is a d-powerful number, because it can be written as 6² + 4⁴ + 7⁶ + 9⁶ + 2⁷ + 6³ .

It is a junction number, because it is equal to n+sod(n) for n = 649691 and 649700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956 + ... + 2263.

It is an arithmetic number, because the mean of its divisors is an integer number (75960).

2⁶⁴⁹⁷²⁶ is an apocalyptic number.

649726 is a deficient number, since it is larger than the sum of its proper divisors (565634).

649726 is a wasteful number, since it uses less digits than its factorization.

649726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239.

The product of its digits is 18144, while the sum is 34.

The square root of 649726 is about 806.0558293319. The cubic root of 649726 is about 86.6117370534.

It can be divided in two parts, 649 and 726, that multiplied together give a palindrome (471174).

The spelling of 649726 in words is "six hundred forty-nine thousand, seven hundred twenty-six".