398123266 has 8 divisors (see below), whose sum is σ = 616449024. Its totient is φ = 192640260.

The previous prime is 398123251. The next prime is 398123267. The reversal of 398123266 is 662321893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (398123267) 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, 3210610 + ... + 3210733.

It is an arithmetic number, because the mean of its divisors is an integer number (77056128).

Almost surely, 2^398123266 is an apocalyptic number.

398123266 is a deficient number, since it is larger than the sum of its proper divisors (218325758).

398123266 is a wasteful number, since it uses less digits than its factorization.

398123266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421376.

The product of its digits is 93312, while the sum is 40.

The square root of 398123266 is about 19953.0264872274. The cubic root of 398123266 is about 735.6521683152.

The spelling of 398123266 in words is "three hundred ninety-eight million, one hundred twenty-three thousand, two hundred sixty-six".