355240 has 32 divisors (see below), whose sum is σ = 816480. Its totient is φ = 139072.

The previous prime is 355211. The next prime is 355261. The reversal of 355240 is 42553.

It is a happy 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, 3267 + ... + 3373.

It is an arithmetic number, because the mean of its divisors is an integer number (25515).

2³⁵⁵²⁴⁰ 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 355240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408240).

355240 is an abundant number, since it is smaller than the sum of its proper divisors (461240).

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

355240 is a wasteful number, since it uses less digits than its factorization.

355240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 355240 is about 596.0201338881. The cubic root of 355240 is about 70.8229404206.

Adding to 355240 its reverse (42553), we get a palindrome (397793).

It can be divided in two parts, 355 and 240, that added together give a palindrome (595).

The spelling of 355240 in words is "three hundred fifty-five thousand, two hundred forty".