238072905 has 64 divisors (see below), whose sum is σ = 486604800. Its totient is φ = 108181440.

The previous prime is 238072903. The next prime is 238072949. The reversal of 238072905 is 509270832.

It is a happy number.

It is not a de Polignac number, because 238072905 - 2¹ = 238072903 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 238072905.

It is not an unprimeable number, because it can be changed into a prime (238072903) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179836 + ... + 181154.

It is an arithmetic number, because the mean of its divisors is an integer number (7603200).

Almost surely, 2^238072905 is an apocalyptic number.

It is an amenable number.

238072905 is an abundant number, since it is smaller than the sum of its proper divisors (248531895).

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

238072905 is a wasteful number, since it uses less digits than its factorization.

238072905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 238072905 is about 15429.6113042422. The cubic root of 238072905 is about 619.7787148213.

The spelling of 238072905 in words is "two hundred thirty-eight million, seventy-two thousand, nine hundred five".