238920905 has 16 divisors (see below), whose sum is σ = 289808064. Its totient is φ = 189080640.

The previous prime is 238920901. The next prime is 238920911. The reversal of 238920905 is 509029832.

It is not a de Polignac number, because 238920905 - 2² = 238920901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238920901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204854 + ... + 206016.

It is an arithmetic number, because the mean of its divisors is an integer number (18113004).

Almost surely, 2^238920905 is an apocalyptic number.

It is an amenable number.

238920905 is a deficient number, since it is larger than the sum of its proper divisors (50887159).

238920905 is a wasteful number, since it uses less digits than its factorization.

238920905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 238920905 is about 15457.0665069411. The cubic root of 238920905 is about 620.5137131531.

The spelling of 238920905 in words is "two hundred thirty-eight million, nine hundred twenty thousand, nine hundred five".