400466643 has 4 divisors (see below), whose sum is σ = 533955528. Its totient is φ = 266977760.

The previous prime is 400466641. The next prime is 400466669. The reversal of 400466643 is 346664004.

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

It is a cyclic number.

It is not a de Polignac number, because 400466643 - 2¹ = 400466641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400466641) 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, 66744438 + ... + 66744443.

It is an arithmetic number, because the mean of its divisors is an integer number (133488882).

Almost surely, 2^400466643 is an apocalyptic number.

400466643 is a deficient number, since it is larger than the sum of its proper divisors (133488885).

400466643 is a wasteful number, since it uses less digits than its factorization.

400466643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133488884.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 400466643 is about 20011.6626745506. The cubic root of 400466643 is about 737.0927096327.

The spelling of 400466643 in words is "four hundred million, four hundred sixty-six thousand, six hundred forty-three".