238887421 has 4 divisors (see below), whose sum is σ = 240353152. Its totient is φ = 237421692.

The previous prime is 238887419. The next prime is 238887427. The reversal of 238887421 is 124788832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238887421 - 2¹ = 238887419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238887427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732621 + ... + 732946.

It is an arithmetic number, because the mean of its divisors is an integer number (60088288).

Almost surely, 2^238887421 is an apocalyptic number.

It is an amenable number.

238887421 is a deficient number, since it is larger than the sum of its proper divisors (1465731).

238887421 is a wasteful number, since it uses less digits than its factorization.

238887421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465730.

The product of its digits is 172032, while the sum is 43.

The square root of 238887421 is about 15455.9833397943. The cubic root of 238887421 is about 620.4847241287.

The spelling of 238887421 in words is "two hundred thirty-eight million, eight hundred eighty-seven thousand, four hundred twenty-one".