438142685 has 8 divisors (see below), whose sum is σ = 542731776. Its totient is φ = 339207120.

The previous prime is 438142667. The next prime is 438142711. The reversal of 438142685 is 586241834.

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

It is not a de Polignac number, because 438142685 - 2¹⁶ = 438077149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1413209 + ... + 1413518.

It is an arithmetic number, because the mean of its divisors is an integer number (67841472).

Almost surely, 2^438142685 is an apocalyptic number.

It is an amenable number.

438142685 is a deficient number, since it is larger than the sum of its proper divisors (104589091).

438142685 is a wasteful number, since it uses less digits than its factorization.

438142685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826763.

The product of its digits is 184320, while the sum is 41.

The square root of 438142685 is about 20931.8581353878. The cubic root of 438142685 is about 759.5187887494.

The spelling of 438142685 in words is "four hundred thirty-eight million, one hundred forty-two thousand, six hundred eighty-five".