338771778 has 16 divisors (see below), whose sum is σ = 695856000. Its totient is φ = 109871856.

The previous prime is 338771777. The next prime is 338771779. The reversal of 338771778 is 877177833.

It is an interprime number because it is at equal distance from previous prime (338771777) and next prime (338771779).

It is a super-2 number, since 2×338771778² = 229532635138562568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 338771778.

It is not an unprimeable number, because it can be changed into a prime (338771777) 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 7 ways as a sum of consecutive naturals, for example, 762778 + ... + 763221.

It is an arithmetic number, because the mean of its divisors is an integer number (43491000).

Almost surely, 2^338771778 is an apocalyptic number.

338771778 is an abundant number, since it is smaller than the sum of its proper divisors (357084222).

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

338771778 is a wasteful number, since it uses less digits than its factorization.

338771778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526041.

The product of its digits is 1382976, while the sum is 51.

The square root of 338771778 is about 18405.7539372882. The cubic root of 338771778 is about 697.1117578324. Note that the first 3 decimals are identical.

The spelling of 338771778 in words is "three hundred thirty-eight million, seven hundred seventy-one thousand, seven hundred seventy-eight".