338720440 has 16 divisors (see below), whose sum is σ = 762121080. Its totient is φ = 135488160.

The previous prime is 338720423. The next prime is 338720441. The reversal of 338720440 is 44027833.

It is a happy number.

It is a super-2 number, since 2×338720440² = 229463072947587200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338720441) by changing a digit.

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, 4233966 + ... + 4234045.

Almost surely, 2^338720440 is an apocalyptic number.

It is an amenable number.

338720440 is an abundant number, since it is smaller than the sum of its proper divisors (423400640).

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

338720440 is a wasteful number, since it uses less digits than its factorization.

338720440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468022 (or 8468018 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 338720440 is about 18404.3592662173. The cubic root of 338720440 is about 697.0765422549.

The spelling of 338720440 in words is "three hundred thirty-eight million, seven hundred twenty thousand, four hundred forty".