438285905 has 16 divisors (see below), whose sum is σ = 557589504. Its totient is φ = 330143040.

The previous prime is 438285871. The next prime is 438285919. The reversal of 438285905 is 509582834.

It is not a de Polignac number, because 438285905 - 2¹⁴ = 438269521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32477 + ... + 43946.

It is an arithmetic number, because the mean of its divisors is an integer number (34849344).

Almost surely, 2^438285905 is an apocalyptic number.

It is an amenable number.

438285905 is a deficient number, since it is larger than the sum of its proper divisors (119303599).

438285905 is a wasteful number, since it uses less digits than its factorization.

438285905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76496.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 438285905 is about 20935.2789568231. The cubic root of 438285905 is about 759.6015368543.

The spelling of 438285905 in words is "four hundred thirty-eight million, two hundred eighty-five thousand, nine hundred five".