239988642 has 16 divisors (see below), whose sum is σ = 481019520. Its totient is φ = 79822512.

The previous prime is 239988641. The next prime is 239988667. The reversal of 239988642 is 246889932.

239988642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (239988641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40417 + ... + 45972.

It is an arithmetic number, because the mean of its divisors is an integer number (30063720).

Almost surely, 2^239988642 is an apocalyptic number.

239988642 is an abundant number, since it is smaller than the sum of its proper divisors (241030878).

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

239988642 is a wasteful number, since it uses less digits than its factorization.

239988642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86857.

The product of its digits is 1492992, while the sum is 51.

The square root of 239988642 is about 15491.5668026188. The cubic root of 239988642 is about 621.4366977176.

It can be divided in two parts, 23998 and 8642, that added together give a triangular number (32640 = T₂₅₅).

The spelling of 239988642 in words is "two hundred thirty-nine million, nine hundred eighty-eight thousand, six hundred forty-two".