438370857 has 48 divisors (see below), whose sum is σ = 693718272. Its totient is φ = 265628160.

The previous prime is 438370843. The next prime is 438370879. The reversal of 438370857 is 758073834.

It is not a de Polignac number, because 438370857 - 2¹⁴ = 438354473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438370817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1194288 + ... + 1194654.

It is an arithmetic number, because the mean of its divisors is an integer number (14452464).

Almost surely, 2^438370857 is an apocalyptic number.

It is an amenable number.

438370857 is a deficient number, since it is larger than the sum of its proper divisors (255347415).

438370857 is a wasteful number, since it uses less digits than its factorization.

438370857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 438370857 is about 20937.3077782221. The cubic root of 438370857 is about 759.6506109862.

The spelling of 438370857 in words is "four hundred thirty-eight million, three hundred seventy thousand, eight hundred fifty-seven".