238220811 has 8 divisors (see below), whose sum is σ = 352919760. Its totient is φ = 158813856.

The previous prime is 238220809. The next prime is 238220869. The reversal of 238220811 is 118022832.

It is not a de Polignac number, because 238220811 - 2¹ = 238220809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8822993 = 238220811 / (2 + 3 + 8 + 2 + 2 + 0 + 8 + 1 + 1).

It is not an unprimeable number, because it can be changed into a prime (238221811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4411470 + ... + 4411523.

It is an arithmetic number, because the mean of its divisors is an integer number (44114970).

Almost surely, 2^238220811 is an apocalyptic number.

238220811 is a deficient number, since it is larger than the sum of its proper divisors (114698949).

238220811 is an equidigital number, since it uses as much as digits as its factorization.

238220811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8823002 (or 8822996 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 238220811 is about 15434.4034870156. The cubic root of 238220811 is about 619.9070368769.

The spelling of 238220811 in words is "two hundred thirty-eight million, two hundred twenty thousand, eight hundred eleven".