238861539 has 12 divisors (see below), whose sum is σ = 394311216. Its totient is φ = 136492272.

The previous prime is 238861501. The next prime is 238861549. The reversal of 238861539 is 935168832.

It is a happy number.

238861539 is a `hidden beast` number, since 2 + 38 + 86 + 1 + 539 = 666.

It is not a de Polignac number, because 238861539 - 2⁷ = 238861411 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 238861494 and 238861503.

It is not an unprimeable number, because it can be changed into a prime (238861549) 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 11 ways as a sum of consecutive naturals, for example, 1895664 + ... + 1895789.

It is an arithmetic number, because the mean of its divisors is an integer number (32859268).

Almost surely, 2^238861539 is an apocalyptic number.

238861539 is a deficient number, since it is larger than the sum of its proper divisors (155449677).

238861539 is a wasteful number, since it uses less digits than its factorization.

238861539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791466 (or 3791463 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 238861539 is about 15455.1460361913. The cubic root of 238861539 is about 620.4623147366.

It can be divided in two parts, 23886 and 1539, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 238861539 in words is "two hundred thirty-eight million, eight hundred sixty-one thousand, five hundred thirty-nine".