649674 has 32 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 211536.

The previous prime is 649661. The next prime is 649697. The reversal of 649674 is 476946.

649674 is a `hidden beast` number, since 649 + 6 + 7 + 4 = 666.

It is an Ulam number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

649674 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2749 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (46170).

2⁶⁴⁹⁶⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738720).

649674 is an abundant number, since it is smaller than the sum of its proper divisors (827766).

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

649674 is a wasteful number, since it uses less digits than its factorization.

649674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 285 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 649674 is about 806.0235728563. The cubic root of 649674 is about 86.6094263714.

The spelling of 649674 in words is "six hundred forty-nine thousand, six hundred seventy-four".