352640 has 64 divisors (see below), whose sum is σ = 918000. Its totient is φ = 129024.

The previous prime is 352637. The next prime is 352661. The reversal of 352640 is 46253.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 12146 + ... + 12174.

2³⁵²⁶⁴⁰ 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 352640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459000).

352640 is an abundant number, since it is smaller than the sum of its proper divisors (565360).

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

352640 is a wasteful number, since it uses less digits than its factorization.

352640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 352640 is about 593.8349939167. The cubic root of 352640 is about 70.6497328991.

Adding to 352640 its reverse (46253), we get a palindrome (398893).

The spelling of 352640 in words is "three hundred fifty-two thousand, six hundred forty".