64438437 has 8 divisors (see below), whose sum is σ = 98191936. Its totient is φ = 36821952.

The previous prime is 64438417. The next prime is 64438469. The reversal of 64438437 is 73483446.

64438437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64438437 - 2¹⁵ = 64405669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64438395 and 64438404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64438417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534228 + ... + 1534269.

It is an arithmetic number, because the mean of its divisors is an integer number (12273992).

Almost surely, 2^64438437 is an apocalyptic number.

It is an amenable number.

64438437 is a deficient number, since it is larger than the sum of its proper divisors (33753499).

64438437 is a wasteful number, since it uses less digits than its factorization.

64438437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068507.

The product of its digits is 193536, while the sum is 39.

The square root of 64438437 is about 8027.3555421446. The cubic root of 64438437 is about 400.9113325224.

The spelling of 64438437 in words is "sixty-four million, four hundred thirty-eight thousand, four hundred thirty-seven".