438042887 has 2 divisors, whose sum is σ = 438042888. Its totient is φ = 438042886.

The previous prime is 438042881. The next prime is 438042901. The reversal of 438042887 is 788240834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438042887 - 2¹² = 438038791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438042881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219021443 + 219021444.

It is an arithmetic number, because the mean of its divisors is an integer number (219021444).

Almost surely, 2^438042887 is an apocalyptic number.

438042887 is a deficient number, since it is larger than the sum of its proper divisors (1).

438042887 is an equidigital number, since it uses as much as digits as its factorization.

438042887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 44.

The square root of 438042887 is about 20929.4741214394. The cubic root of 438042887 is about 759.4611178776.

The spelling of 438042887 in words is "four hundred thirty-eight million, forty-two thousand, eight hundred eighty-seven".