399628466 has 4 divisors (see below), whose sum is σ = 599442702. Its totient is φ = 199814232.

The previous prime is 399628441. The next prime is 399628543. The reversal of 399628466 is 664826993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 339333241 + 60295225 = 18421^2 + 7765^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99907115 + ... + 99907118.

Almost surely, 2^399628466 is an apocalyptic number.

399628466 is a deficient number, since it is larger than the sum of its proper divisors (199814236).

399628466 is a wasteful number, since it uses less digits than its factorization.

399628466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199814235.

The product of its digits is 3359232, while the sum is 53.

The square root of 399628466 is about 19990.7094921616. The cubic root of 399628466 is about 736.5781052353.

The spelling of 399628466 in words is "three hundred ninety-nine million, six hundred twenty-eight thousand, four hundred sixty-six".