356240 has 40 divisors (see below), whose sum is σ = 853368. Its totient is φ = 138240.

The previous prime is 356219. The next prime is 356243. The reversal of 356240 is 42653.

356240 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 1024 + 355216 = 32^2 + 596^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a d-powerful number, because it can be written as 3 + 5⁷ + 2¹³ + 6⁵ + 4⁹ + 0 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4844 + ... + 4916.

2³⁵⁶²⁴⁰ 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 356240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426684).

356240 is an abundant number, since it is smaller than the sum of its proper divisors (497128).

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

356240 is a wasteful number, since it uses less digits than its factorization.

356240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 141 counting only the distinct ones).

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

The square root of 356240 is about 596.8584421787. The cubic root of 356240 is about 70.8893336465.

Adding to 356240 its reverse (42653), we get a palindrome (398893).

The spelling of 356240 in words is "three hundred fifty-six thousand, two hundred forty".