239040020 has 12 divisors (see below), whose sum is σ = 501984084. Its totient is φ = 95616000.

The previous prime is 239040013. The next prime is 239040049. The reversal of 239040020 is 20040932.

It can be written as a sum of positive squares in 2 ways, for example, as 25120144 + 213919876 = 5012^2 + 14626^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11952001 = 239040020 / (2 + 3 + 9 + 0 + 4 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 239039974 and 239040001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5975981 + ... + 5976020.

It is an arithmetic number, because the mean of its divisors is an integer number (41832007).

Almost surely, 2^239040020 is an apocalyptic number.

239040020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239040020 is an abundant number, since it is smaller than the sum of its proper divisors (262944064).

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

239040020 is a wasteful number, since it uses less digits than its factorization.

239040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952010 (or 11952008 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 239040020 is about 15460.9191188622. The cubic root of 239040020 is about 620.6168159090.

Adding to 239040020 its reverse (20040932), we get a palindrome (259080952).

The spelling of 239040020 in words is "two hundred thirty-nine million, forty thousand, twenty".