648938 has 4 divisors (see below), whose sum is σ = 973410. Its totient is φ = 324468.

The previous prime is 648937. The next prime is 648953. The reversal of 648938 is 839846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 528529 + 120409 = 727^2 + 347^2 .

It is a super-3 number, since 3×648938³ = 819843339294089016, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (648931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162233 + ... + 162236.

2⁶⁴⁸⁹³⁸ is an apocalyptic number.

648938 is a deficient number, since it is larger than the sum of its proper divisors (324472).

648938 is a wasteful number, since it uses less digits than its factorization.

648938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324471.

The product of its digits is 41472, while the sum is 38.

The square root of 648938 is about 805.5668811464. The cubic root of 648938 is about 86.5767081032.

The spelling of 648938 in words is "six hundred forty-eight thousand, nine hundred thirty-eight".