438540557 has 8 divisors (see below), whose sum is σ = 539742336. Its totient is φ = 346977072.

The previous prime is 438540533. The next prime is 438540559. The reversal of 438540557 is 755045834.

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

It is not a de Polignac number, because 438540557 - 2⁸ = 438540301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438540559) 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, 2409473 + ... + 2409654.

It is an arithmetic number, because the mean of its divisors is an integer number (67467792).

Almost surely, 2^438540557 is an apocalyptic number.

It is an amenable number.

438540557 is a deficient number, since it is larger than the sum of its proper divisors (101201779).

438540557 is a wasteful number, since it uses less digits than its factorization.

438540557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819147.

The product of its (nonzero) digits is 336000, while the sum is 41.

The square root of 438540557 is about 20941.3599606138. The cubic root of 438540557 is about 759.7486224268.

The spelling of 438540557 in words is "four hundred thirty-eight million, five hundred forty thousand, five hundred fifty-seven".