338862721 has 4 divisors (see below), whose sum is σ = 338966100. Its totient is φ = 338759344.

The previous prime is 338862707. The next prime is 338862731. The reversal of 338862721 is 127268833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127268833 = 509 ⋅250037.

It can be written as a sum of positive squares in 2 ways, for example, as 150185025 + 188677696 = 12255^2 + 13736^2 .

It is a cyclic number.

It is not a de Polignac number, because 338862721 - 2²³ = 330474113 is a prime.

It is a super-2 number, since 2×338862721² = 229655887367047682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338862731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46606 + ... + 53383.

It is an arithmetic number, because the mean of its divisors is an integer number (84741525).

Almost surely, 2^338862721 is an apocalyptic number.

It is an amenable number.

338862721 is a deficient number, since it is larger than the sum of its proper divisors (103379).

338862721 is an equidigital number, since it uses as much as digits as its factorization.

338862721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103378.

The product of its digits is 96768, while the sum is 40.

The square root of 338862721 is about 18408.2242761218. The cubic root of 338862721 is about 697.1741319404.

The spelling of 338862721 in words is "three hundred thirty-eight million, eight hundred sixty-two thousand, seven hundred twenty-one".