238439540 has 12 divisors (see below), whose sum is σ = 500723076. Its totient is φ = 95375808.

The previous prime is 238439503. The next prime is 238439563. The reversal of 238439540 is 45934832.

238439540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57214096 + 181225444 = 7564^2 + 13462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 238439494 and 238439503.

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, 5960969 + ... + 5961008.

It is an arithmetic number, because the mean of its divisors is an integer number (41726923).

Almost surely, 2^238439540 is an apocalyptic number.

238439540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238439540 is an abundant number, since it is smaller than the sum of its proper divisors (262283536).

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

238439540 is a wasteful number, since it uses less digits than its factorization.

238439540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11921986 (or 11921984 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 238439540 is about 15441.4876226353. The cubic root of 238439540 is about 620.0967070793.

The spelling of 238439540 in words is "two hundred thirty-eight million, four hundred thirty-nine thousand, five hundred forty".