239839428 has 12 divisors (see below), whose sum is σ = 559625360. Its totient is φ = 79946472.

The previous prime is 239839421. The next prime is 239839433. The reversal of 239839428 is 824938932.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (239839421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9993298 + ... + 9993321.

Almost surely, 2^239839428 is an apocalyptic number.

It is an amenable number.

239839428 is an abundant number, since it is smaller than the sum of its proper divisors (319785932).

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

239839428 is a wasteful number, since it uses less digits than its factorization.

239839428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19986626 (or 19986624 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 239839428 is about 15486.7500786963. The cubic root of 239839428 is about 621.3078773435.

It can be divided in two parts, 23983 and 9428, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 239839428 in words is "two hundred thirty-nine million, eight hundred thirty-nine thousand, four hundred twenty-eight".