64438489 has 4 divisors (see below), whose sum is σ = 64457680. Its totient is φ = 64419300.

The previous prime is 64438471. The next prime is 64438499. The reversal of 64438489 is 98483446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64438489 - 2¹⁷ = 64307417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64438469) 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, 3087 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (16114420).

Almost surely, 2^64438489 is an apocalyptic number.

It is an amenable number.

64438489 is a deficient number, since it is larger than the sum of its proper divisors (19191).

64438489 is a wasteful number, since it uses less digits than its factorization.

64438489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190.

The product of its digits is 663552, while the sum is 46.

The square root of 64438489 is about 8027.3587810687. The cubic root of 64438489 is about 400.9114403638.

The spelling of 64438489 in words is "sixty-four million, four hundred thirty-eight thousand, four hundred eighty-nine".