239406642 has 24 divisors (see below), whose sum is σ = 520363116. Its totient is φ = 79548576.

The previous prime is 239406641. The next prime is 239406647. The reversal of 239406642 is 246604932.

239406642 is a `hidden beast` number, since 2 + 3 + 9 + 4 + 0 + 6 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 224730081 + 14676561 = 14991^2 + 3831^2 .

239406642 is a modest number, since divided by 6642 gives 2394 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 239406597 and 239406606.

It is not an unprimeable number, because it can be changed into a prime (239406641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15273 + ... + 26684.

Almost surely, 2^239406642 is an apocalyptic number.

239406642 is an abundant number, since it is smaller than the sum of its proper divisors (280956474).

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

239406642 is a wasteful number, since it uses less digits than its factorization.

239406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42282 (or 42279 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 239406642 is about 15472.7709864781. The cubic root of 239406642 is about 620.9339393115.

The spelling of 239406642 in words is "two hundred thirty-nine million, four hundred six thousand, six hundred forty-two".