649438 has 8 divisors (see below), whose sum is σ = 977688. Its totient is φ = 323544.

The previous prime is 649427. The next prime is 649457. The reversal of 649438 is 834946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 6 + 4 + 4⁸ + 9⁶ + 3⁹ + 8⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (122211).

2⁶⁴⁹⁴³⁸ is an apocalyptic number.

649438 is a deficient number, since it is larger than the sum of its proper divisors (328250).

649438 is a wasteful number, since it uses less digits than its factorization.

649438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178.

The product of its digits is 20736, while the sum is 34.

The square root of 649438 is about 805.8771618553. The cubic root of 649438 is about 86.5989378802.

The spelling of 649438 in words is "six hundred forty-nine thousand, four hundred thirty-eight".