400436667 has 12 divisors (see below), whose sum is σ = 580070400. Its totient is φ = 266190768.

The previous prime is 400436651. The next prime is 400436713. The reversal of 400436667 is 766634004.

It is not a de Polignac number, because 400436667 - 2⁴ = 400436651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400436867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60603 + ... + 66884.

It is an arithmetic number, because the mean of its divisors is an integer number (48339200).

Almost surely, 2^400436667 is an apocalyptic number.

400436667 is a deficient number, since it is larger than the sum of its proper divisors (179633733).

400436667 is a wasteful number, since it uses less digits than its factorization.

400436667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127842 (or 127839 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 400436667 is about 20010.9136972803. The cubic root of 400436667 is about 737.0743180532.

The spelling of 400436667 in words is "four hundred million, four hundred thirty-six thousand, six hundred sixty-seven".