732640 has 48 divisors (see below), whose sum is σ = 1829520. Its totient is φ = 276480.

The previous prime is 732631. The next prime is 732653. The reversal of 732640 is 46237.

732640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×732640² = 1073522739200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920 + ... + 3160.

It is an arithmetic number, because the mean of its divisors is an integer number (38115).

2⁷³²⁶⁴⁰ 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 732640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914760).

732640 is an abundant number, since it is smaller than the sum of its proper divisors (1096880).

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

732640 is a wasteful number, since it uses less digits than its factorization.

732640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 732640 is about 855.9439233969. The cubic root of 732640 is about 90.1495456134.

Adding to 732640 its reverse (46237), we get a palindrome (778877).

The spelling of 732640 in words is "seven hundred thirty-two thousand, six hundred forty".