387438489 has 6 divisors (see below), whose sum is σ = 559633386. Its totient is φ = 258292320.

The previous prime is 387438487. The next prime is 387438523. The reversal of 387438489 is 984834783.

It can be written as a sum of positive squares in only one way, i.e., 298702089 + 88736400 = 17283^2 + 9420^2 .

It is not a de Polignac number, because 387438489 - 2¹ = 387438487 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (387438487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21524352 + ... + 21524369.

It is an arithmetic number, because the mean of its divisors is an integer number (93272231).

Almost surely, 2^387438489 is an apocalyptic number.

It is an amenable number.

387438489 is a deficient number, since it is larger than the sum of its proper divisors (172194897).

387438489 is a wasteful number, since it uses less digits than its factorization.

387438489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43048727 (or 43048724 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 387438489 is about 19683.4572420599. The cubic root of 387438489 is about 729.0112898837.

The spelling of 387438489 in words is "three hundred eighty-seven million, four hundred thirty-eight thousand, four hundred eighty-nine".