338641840 has 20 divisors (see below), whose sum is σ = 787342464. Its totient is φ = 135456704.

The previous prime is 338641829. The next prime is 338641889. The reversal of 338641840 is 48146833.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×338641840² = 229356591597171200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 338641840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116432 + ... + 2116591.

Almost surely, 2^338641840 is an apocalyptic number.

It is an amenable number.

338641840 is an abundant number, since it is smaller than the sum of its proper divisors (448700624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

338641840 is a wasteful number, since it uses less digits than its factorization.

338641840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233036 (or 4233030 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 338641840 is about 18402.2237786633. The cubic root of 338641840 is about 697.0226192668.

The spelling of 338641840 in words is "three hundred thirty-eight million, six hundred forty-one thousand, eight hundred forty".