623240 has 16 divisors (see below), whose sum is σ = 1402380. Its totient is φ = 249280.

The previous prime is 623221. The next prime is 623261. The reversal of 623240 is 42326.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 17956 = 778^2 + 134^2 .

It is an unprimeable number.

623240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7751 + ... + 7830.

2⁶²³²⁴⁰ is an apocalyptic number.

It is an amenable number.

623240 is an abundant number, since it is smaller than the sum of its proper divisors (779140).

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

623240 is a wasteful number, since it uses less digits than its factorization.

623240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15592 (or 15588 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 623240 is about 789.4555085627. The cubic root of 623240 is about 85.4184670121.

Adding to 623240 its reverse (42326), we get a palindrome (665566).

The spelling of 623240 in words is "six hundred twenty-three thousand, two hundred forty".