438864157 has 4 divisors (see below), whose sum is σ = 439065216. Its totient is φ = 438663100.

The previous prime is 438864131. The next prime is 438864161. The reversal of 438864157 is 751468834.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438864157 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 (438864557) 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, 97219 + ... + 101632.

It is an arithmetic number, because the mean of its divisors is an integer number (109766304).

Almost surely, 2^438864157 is an apocalyptic number.

It is an amenable number.

438864157 is a deficient number, since it is larger than the sum of its proper divisors (201059).

438864157 is a wasteful number, since it uses less digits than its factorization.

438864157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201058.

The product of its digits is 645120, while the sum is 46.

The square root of 438864157 is about 20949.0848726144. The cubic root of 438864157 is about 759.9354498500.

The spelling of 438864157 in words is "four hundred thirty-eight million, eight hundred sixty-four thousand, one hundred fifty-seven".