649512 has 64 divisors (see below), whose sum is σ = 1881600. Its totient is φ = 207360.

The previous prime is 649511. The next prime is 649529. The reversal of 649512 is 215946.

649512 is a `hidden beast` number, since 649 + 5 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649512.

It is not an unprimeable number, because it can be changed into a prime (649511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6648 + ... + 6744.

It is an arithmetic number, because the mean of its divisors is an integer number (29400).

2⁶⁴⁹⁵¹² is an apocalyptic number.

649512 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940800).

649512 is an abundant number, since it is smaller than the sum of its proper divisors (1232088).

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

649512 is a wasteful number, since it uses less digits than its factorization.

649512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 133 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 649512 is about 805.9230732520. The cubic root of 649512 is about 86.6022269178.

The spelling of 649512 in words is "six hundred forty-nine thousand, five hundred twelve".