649582 has 4 divisors (see below), whose sum is σ = 974376. Its totient is φ = 324790.

The previous prime is 649577. The next prime is 649613. The reversal of 649582 is 285946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 285946 = 2 ⋅142973.

It is a d-powerful number, because it can be written as 6⁵ + 4³ + 5⁷ + 9⁴ + 8⁵ + 2¹⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162394 + ... + 162397.

It is an arithmetic number, because the mean of its divisors is an integer number (243594).

2⁶⁴⁹⁵⁸² is an apocalyptic number.

649582 is a deficient number, since it is larger than the sum of its proper divisors (324794).

649582 is a wasteful number, since it uses less digits than its factorization.

649582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324793.

The product of its digits is 17280, while the sum is 34.

The square root of 649582 is about 805.9665005445. The cubic root of 649582 is about 86.6053379397.

The spelling of 649582 in words is "six hundred forty-nine thousand, five hundred eighty-two".