400466399 has 4 divisors (see below), whose sum is σ = 424023264. Its totient is φ = 376909536.

The previous prime is 400466389. The next prime is 400466419. The reversal of 400466399 is 993664004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400466399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400466309) 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, 11778407 + ... + 11778440.

It is an arithmetic number, because the mean of its divisors is an integer number (106005816).

Almost surely, 2^400466399 is an apocalyptic number.

400466399 is a deficient number, since it is larger than the sum of its proper divisors (23556865).

400466399 is a wasteful number, since it uses less digits than its factorization.

400466399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23556864.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 400466399 is about 20011.6565781047. The cubic root of 400466399 is about 737.0925599318.

The spelling of 400466399 in words is "four hundred million, four hundred sixty-six thousand, three hundred ninety-nine".