399303466 has 4 divisors (see below), whose sum is σ = 598955202. Its totient is φ = 199651732.

The previous prime is 399303439. The next prime is 399303511. The reversal of 399303466 is 664303993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 664303993 = 353 ⋅1881881.

It can be written as a sum of positive squares in only one way, i.e., 386948241 + 12355225 = 19671^2 + 3515^2 .

It is a super-2 number, since 2×399303466² = 318886515919226312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99825865 + ... + 99825868.

Almost surely, 2^399303466 is an apocalyptic number.

399303466 is a deficient number, since it is larger than the sum of its proper divisors (199651736).

399303466 is a wasteful number, since it uses less digits than its factorization.

399303466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199651735.

The product of its (nonzero) digits is 314928, while the sum is 43.

The square root of 399303466 is about 19982.5790627737. The cubic root of 399303466 is about 736.3783757129.

The spelling of 399303466 in words is "three hundred ninety-nine million, three hundred three thousand, four hundred sixty-six".