398263346 has 8 divisors (see below), whose sum is σ = 643348524. Its totient is φ = 183813840.

The previous prime is 398263339. The next prime is 398263363. The reversal of 398263346 is 643362893.

It can be written as a sum of positive squares in 2 ways, for example, as 289374121 + 108889225 = 17011^2 + 10435^2 .

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

It is a super-2 number, since 2×398263346² = 317227385534231432, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 398263297 and 398263306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7658885 + ... + 7658936.

Almost surely, 2^398263346 is an apocalyptic number.

398263346 is a deficient number, since it is larger than the sum of its proper divisors (245085178).

398263346 is a wasteful number, since it uses less digits than its factorization.

398263346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15317836.

The product of its digits is 559872, while the sum is 44.

The square root of 398263346 is about 19956.5364229367. The cubic root of 398263346 is about 735.7384381390.

The spelling of 398263346 in words is "three hundred ninety-eight million, two hundred sixty-three thousand, three hundred forty-six".