649716 has 24 divisors (see below), whose sum is σ = 1569120. Its totient is φ = 208992.

The previous prime is 649709. The next prime is 649717. The reversal of 649716 is 617946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649717) 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, 586 + ... + 1281.

It is an arithmetic number, because the mean of its divisors is an integer number (65380).

2⁶⁴⁹⁷¹⁶ is an apocalyptic number.

It is an amenable number.

649716 is an abundant number, since it is smaller than the sum of its proper divisors (919404).

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

649716 is a wasteful number, since it uses less digits than its factorization.

649716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1901 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 649716 is about 806.0496262638. The cubic root of 649716 is about 86.6112927011.

The spelling of 649716 in words is "six hundred forty-nine thousand, seven hundred sixteen".