649420 has 24 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 245952.

The previous prime is 649403. The next prime is 649421. The reversal of 649420 is 24946.

649420 = 31² + 32² + ... + 125².

649420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (649421) 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, 475 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (59850).

2⁶⁴⁹⁴²⁰ is an apocalyptic number.

It is an amenable number.

649420 is an abundant number, since it is smaller than the sum of its proper divisors (786980).

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

649420 is a wasteful number, since it uses less digits than its factorization.

649420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 649420 is about 805.8659938228. The cubic root of 649420 is about 86.5981378063.

The spelling of 649420 in words is "six hundred forty-nine thousand, four hundred twenty".