438722389 has 16 divisors (see below), whose sum is σ = 508162048. Its totient is φ = 371008512.

The previous prime is 438722381. The next prime is 438722399. The reversal of 438722389 is 983227834.

It is not a de Polignac number, because 438722389 - 2³ = 438722381 is a prime.

It is a super-3 number, since 3×438722389³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438722381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170299 + ... + 172855.

It is an arithmetic number, because the mean of its divisors is an integer number (31760128).

Almost surely, 2^438722389 is an apocalyptic number.

It is an amenable number.

438722389 is a deficient number, since it is larger than the sum of its proper divisors (69439659).

438722389 is a wasteful number, since it uses less digits than its factorization.

438722389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884.

The product of its digits is 580608, while the sum is 46.

The square root of 438722389 is about 20945.7009670242. The cubic root of 438722389 is about 759.8536127334.

Subtracting 438722389 from its reverse (983227834), we obtain a palindrome (544505445).

The spelling of 438722389 in words is "four hundred thirty-eight million, seven hundred twenty-two thousand, three hundred eighty-nine".