649264 has 80 divisors (see below), whose sum is σ = 1714176. Its totient is φ = 230400.

The previous prime is 649261. The next prime is 649273. The reversal of 649264 is 462946.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (649261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20929 + ... + 20959.

2⁶⁴⁹²⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857088).

649264 is an abundant number, since it is smaller than the sum of its proper divisors (1064912).

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

649264 is a wasteful number, since it uses less digits than its factorization.

649264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 68 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 649264 is about 805.7691977235. The cubic root of 649264 is about 86.5912032127.

It can be divided in two parts, 6492 and 64, that added together give a palindrome (6556).

The spelling of 649264 in words is "six hundred forty-nine thousand, two hundred sixty-four".