338409457 has 4 divisors (see below), whose sum is σ = 338448240. Its totient is φ = 338370676.

The previous prime is 338409443. The next prime is 338409469. The reversal of 338409457 is 754904833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 754904833 = 41 ⋅18412313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338409457 is a prime.

It is a super-2 number, since 2×338409457² = 229041921174069698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338400457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498 + ... + 26020.

It is an arithmetic number, because the mean of its divisors is an integer number (84612060).

Almost surely, 2^338409457 is an apocalyptic number.

It is an amenable number.

338409457 is a deficient number, since it is larger than the sum of its proper divisors (38783).

338409457 is a wasteful number, since it uses less digits than its factorization.

338409457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38782.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 338409457 is about 18395.9087027524. The cubic root of 338409457 is about 696.8631456944.

The spelling of 338409457 in words is "three hundred thirty-eight million, four hundred nine thousand, four hundred fifty-seven".