438247427 has 4 divisors (see below), whose sum is σ = 438290160. Its totient is φ = 438204696.

The previous prime is 438247417. The next prime is 438247441. The reversal of 438247427 is 724742834.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 438247427 - 2⁸ = 438247171 is a prime.

It is a deceptive number, since it divides R_438247426.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438247417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274 + ... + 29912.

It is an arithmetic number, because the mean of its divisors is an integer number (109572540).

Almost surely, 2^438247427 is an apocalyptic number.

438247427 is the 17093-rd pentagonal number.

438247427 is a deficient number, since it is larger than the sum of its proper divisors (42733).

438247427 is a wasteful number, since it uses less digits than its factorization.

438247427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42732.

The product of its digits is 301056, while the sum is 41.

The square root of 438247427 is about 20934.3599615560. The cubic root of 438247427 is about 759.5793072222.

The spelling of 438247427 in words is "four hundred thirty-eight million, two hundred forty-seven thousand, four hundred twenty-seven".