395530240 has 208 divisors, whose sum is σ = 1132323840. Its totient is φ = 129761280.

The previous prime is 395530237. The next prime is 395530243. The reversal of 395530240 is 42035593.

It is an interprime number because it is at equal distance from previous prime (395530237) and next prime (395530243).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395530243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4444116 + ... + 4444204.

Almost surely, 2^395530240 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 395530240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566161920).

395530240 is an abundant number, since it is smaller than the sum of its proper divisors (736793600).

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

395530240 is an equidigital number, since it uses as much as digits as its factorization.

395530240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 395530240 is about 19887.9420755391. The cubic root of 395530240 is about 734.0515571345.

The spelling of 395530240 in words is "three hundred ninety-five million, five hundred thirty thousand, two hundred forty".