438129157 has 8 divisors (see below), whose sum is σ = 450034200. Its totient is φ = 426282240.

The previous prime is 438129149. The next prime is 438129163. The reversal of 438129157 is 751921834.

It can be written as a sum of positive squares in 4 ways, for example, as 5447556 + 432681601 = 2334^2 + 20801^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 438129157 - 2³ = 438129149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438129557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969 + ... + 29617.

It is an arithmetic number, because the mean of its divisors is an integer number (56254275).

Almost surely, 2^438129157 is an apocalyptic number.

It is an amenable number.

438129157 is a deficient number, since it is larger than the sum of its proper divisors (11905043).

438129157 is a wasteful number, since it uses less digits than its factorization.

438129157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29063.

The product of its digits is 60480, while the sum is 40.

The square root of 438129157 is about 20931.5349891020. The cubic root of 438129157 is about 759.5109717556.

The spelling of 438129157 in words is "four hundred thirty-eight million, one hundred twenty-nine thousand, one hundred fifty-seven".