338784643 has 4 divisors (see below), whose sum is σ = 340504560. Its totient is φ = 337064728.

The previous prime is 338784623. The next prime is 338784671. The reversal of 338784643 is 346487833.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 338784643 - 2¹⁷ = 338653571 is a prime.

It is a super-2 number, since 2×338784643² = 229550068665274898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 338784593 and 338784602.

It is not an unprimeable number, because it can be changed into a prime (338784623) 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, 859663 + ... + 860056.

It is an arithmetic number, because the mean of its divisors is an integer number (85126140).

Almost surely, 2^338784643 is an apocalyptic number.

338784643 is a deficient number, since it is larger than the sum of its proper divisors (1719917).

338784643 is a wasteful number, since it uses less digits than its factorization.

338784643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719916.

The product of its digits is 1161216, while the sum is 46.

The square root of 338784643 is about 18406.1034170734. The cubic root of 338784643 is about 697.1205820909.

The spelling of 338784643 in words is "three hundred thirty-eight million, seven hundred eighty-four thousand, six hundred forty-three".