438141987 has 16 divisors (see below), whose sum is σ = 652402080. Its totient is φ = 290608416.

The previous prime is 438141961. The next prime is 438141989. The reversal of 438141987 is 789141834.

It is a happy number.

It is not a de Polignac number, because 438141987 - 2⁷ = 438141859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438141989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35868 + ... + 46505.

It is an arithmetic number, because the mean of its divisors is an integer number (40775130).

Almost surely, 2^438141987 is an apocalyptic number.

438141987 is a deficient number, since it is larger than the sum of its proper divisors (214260093).

438141987 is a wasteful number, since it uses less digits than its factorization.

438141987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82579 (or 82573 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 438141987 is about 20931.8414622316. The cubic root of 438141987 is about 759.5183854223.

The spelling of 438141987 in words is "four hundred thirty-eight million, one hundred forty-one thousand, nine hundred eighty-seven".