649038 has 32 divisors (see below), whose sum is σ = 1433376. Its totient is φ = 194688.

The previous prime is 649007. The next prime is 649039. The reversal of 649038 is 830946.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 648996 and 649014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649039) by changing a digit.

649038 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4056 + ... + 4212.

It is an arithmetic number, because the mean of its divisors is an integer number (44793).

2⁶⁴⁹⁰³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716688).

649038 is an abundant number, since it is smaller than the sum of its proper divisors (784338).

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

649038 is a wasteful number, since it uses less digits than its factorization.

649038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 649038 is about 805.6289468484. The cubic root of 649038 is about 86.5811549719.

The spelling of 649038 in words is "six hundred forty-nine thousand, thirty-eight".