338437640 has 32 divisors (see below), whose sum is σ = 794594880. Its totient is φ = 129488832.

The previous prime is 338437639. The next prime is 338437643. The reversal of 338437640 is 46734833.

It is a happy number.

It is a super-2 number, since 2×338437640² = 229080072337539200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 338437594 and 338437603.

It is not an unprimeable number, because it can be changed into a prime (338437643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183014 + ... + 184853.

It is an arithmetic number, because the mean of its divisors is an integer number (24831090).

Almost surely, 2^338437640 is an apocalyptic number.

It is an amenable number.

338437640 is an abundant number, since it is smaller than the sum of its proper divisors (456157240).

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

338437640 is a wasteful number, since it uses less digits than its factorization.

338437640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367901 (or 367897 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 338437640 is about 18396.6746995211. The cubic root of 338437640 is about 696.8824902571.

The spelling of 338437640 in words is "three hundred thirty-eight million, four hundred thirty-seven thousand, six hundred forty".