438042881 has 2 divisors, whose sum is σ = 438042882. Its totient is φ = 438042880.

The previous prime is 438042877. The next prime is 438042887. The reversal of 438042881 is 188240834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264225025 + 173817856 = 16255^2 + 13184^2 .

It is a cyclic number.

It is not a de Polignac number, because 438042881 - 2² = 438042877 is a prime.

It is a super-2 number, since 2×438042881² = 383763131189560322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438042887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219021440 + 219021441.

It is an arithmetic number, because the mean of its divisors is an integer number (219021441).

Almost surely, 2^438042881 is an apocalyptic number.

It is an amenable number.

438042881 is a deficient number, since it is larger than the sum of its proper divisors (1).

438042881 is an equidigital number, since it uses as much as digits as its factorization.

438042881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 438042881 is about 20929.4739781008. The cubic root of 438042881 is about 759.4611144101.

The spelling of 438042881 in words is "four hundred thirty-eight million, forty-two thousand, eight hundred eighty-one".