400043465 has 16 divisors (see below), whose sum is σ = 487731456. Its totient is φ = 314932800.

The previous prime is 400043453. The next prime is 400043489. The reversal of 400043465 is 564340004.

It is not a de Polignac number, because 400043465 - 2⁶ = 400043401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365459 + ... + 366551.

It is an arithmetic number, because the mean of its divisors is an integer number (30483216).

Almost surely, 2^400043465 is an apocalyptic number.

It is an amenable number.

400043465 is a deficient number, since it is larger than the sum of its proper divisors (87687991).

400043465 is a wasteful number, since it uses less digits than its factorization.

400043465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 400043465 is about 20001.0865954828. The cubic root of 400043465 is about 736.8329864997.

Adding to 400043465 its reverse (564340004), we get a palindrome (964383469).

The spelling of 400043465 in words is "four hundred million, forty-three thousand, four hundred sixty-five".