238721934 has 16 divisors (see below), whose sum is σ = 520848000. Its totient is φ = 72339960.

The previous prime is 238721897. The next prime is 238721957. The reversal of 238721934 is 439127832.

It is a junction number, because it is equal to n+sod(n) for n = 238721892 and 238721901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1808434 + ... + 1808565.

It is an arithmetic number, because the mean of its divisors is an integer number (32553000).

Almost surely, 2^238721934 is an apocalyptic number.

238721934 is an abundant number, since it is smaller than the sum of its proper divisors (282126066).

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

238721934 is a wasteful number, since it uses less digits than its factorization.

238721934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617015.

The product of its digits is 72576, while the sum is 39.

The square root of 238721934 is about 15450.6289192382. The cubic root of 238721934 is about 620.3414127243.

The spelling of 238721934 in words is "two hundred thirty-eight million, seven hundred twenty-one thousand, nine hundred thirty-four".