438337987 has 4 divisors (see below), whose sum is σ = 453453120. Its totient is φ = 423222856.

The previous prime is 438337981. The next prime is 438337993. The reversal of 438337987 is 789733834.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (438337981) and next prime (438337993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438337987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438337981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7557523 + ... + 7557580.

It is an arithmetic number, because the mean of its divisors is an integer number (113363280).

Almost surely, 2^438337987 is an apocalyptic number.

438337987 is a deficient number, since it is larger than the sum of its proper divisors (15115133).

438337987 is a wasteful number, since it uses less digits than its factorization.

438337987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15115132.

The product of its digits is 3048192, while the sum is 52.

The square root of 438337987 is about 20936.5228010766. The cubic root of 438337987 is about 759.6316237601.

The spelling of 438337987 in words is "four hundred thirty-eight million, three hundred thirty-seven thousand, nine hundred eighty-seven".