438651889 has 4 divisors (see below), whose sum is σ = 472394356. Its totient is φ = 404909424.

The previous prime is 438651887. The next prime is 438651911. The reversal of 438651889 is 988156834.

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

It can be written as a sum of positive squares in 2 ways, for example, as 171819664 + 266832225 = 13108^2 + 16335^2 .

It is a cyclic number.

It is not a de Polignac number, because 438651889 - 2¹ = 438651887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438651887) 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, 16871214 + ... + 16871239.

It is an arithmetic number, because the mean of its divisors is an integer number (118098589).

Almost surely, 2^438651889 is an apocalyptic number.

It is an amenable number.

438651889 is a deficient number, since it is larger than the sum of its proper divisors (33742467).

438651889 is a wasteful number, since it uses less digits than its factorization.

438651889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33742466.

The product of its digits is 1658880, while the sum is 52.

The square root of 438651889 is about 20944.0179765011. The cubic root of 438651889 is about 759.8129092797.

It can be divided in two parts, 43865 and 1889, that added together give a palindrome (45754).

The spelling of 438651889 in words is "four hundred thirty-eight million, six hundred fifty-one thousand, eight hundred eighty-nine".