239540020 has 24 divisors (see below), whose sum is σ = 505648584. Its totient is φ = 95318016.

The previous prime is 239540017. The next prime is 239540023. The reversal of 239540020 is 20045932.

It is a happy number.

239540020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (239540017) and next prime (239540023).

It can be written as a sum of positive squares in 4 ways, for example, as 3794704 + 235745316 = 1948^2 + 15354^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239540023) 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, 27169 + ... + 34888.

It is an arithmetic number, because the mean of its divisors is an integer number (21068691).

Almost surely, 2^239540020 is an apocalyptic number.

239540020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239540020 is an abundant number, since it is smaller than the sum of its proper divisors (266108564).

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

239540020 is a wasteful number, since it uses less digits than its factorization.

239540020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62259 (or 62257 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 239540020 is about 15477.0804740429. The cubic root of 239540020 is about 621.0492292788.

Adding to 239540020 its reverse (20045932), we get a palindrome (259585952).

The spelling of 239540020 in words is "two hundred thirty-nine million, five hundred forty thousand, twenty".