649320 has 64 divisors (see below), whose sum is σ = 2229120. Its totient is φ = 148224.

The previous prime is 649307. The next prime is 649321. The reversal of 649320 is 23946.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (649321) by changing a digit.

649320 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, 454 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (34830).

2⁶⁴⁹³²⁰ is an apocalyptic number.

649320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114560).

649320 is an abundant number, since it is smaller than the sum of its proper divisors (1579800).

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

649320 is a wasteful number, since it uses less digits than its factorization.

649320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 649320 is about 805.8039463790. The cubic root of 649320 is about 86.5936926817.

It can be divided in two parts, 649 and 320, that added together give a palindrome (969).

The spelling of 649320 in words is "six hundred forty-nine thousand, three hundred twenty".