338399890 has 16 divisors (see below), whose sum is σ = 610646040. Its totient is φ = 135020800.

The previous prime is 338399839. The next prime is 338399917. The reversal of 338399890 is 98993833.

It can be written as a sum of positive squares in 4 ways, for example, as 323244441 + 15155449 = 17979^2 + 3893^2 .

It is a super-2 number, since 2×338399890² = 229028971104024200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38185 + ... + 46204.

Almost surely, 2^338399890 is an apocalyptic number.

338399890 is a deficient number, since it is larger than the sum of its proper divisors (272246150).

338399890 is a wasteful number, since it uses less digits than its factorization.

338399890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84797.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 338399890 is about 18395.6486702698. The cubic root of 338399890 is about 696.8565787458.

The spelling of 338399890 in words is "three hundred thirty-eight million, three hundred ninety-nine thousand, eight hundred ninety".