400461665 has 8 divisors (see below), whose sum is σ = 486637440. Its totient is φ = 316313712.

The previous prime is 400461661. The next prime is 400461679. The reversal of 400461665 is 566164004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400461665 - 2² = 400461661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400461661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506519 + ... + 507308.

It is an arithmetic number, because the mean of its divisors is an integer number (60829680).

Almost surely, 2^400461665 is an apocalyptic number.

It is an amenable number.

400461665 is a deficient number, since it is larger than the sum of its proper divisors (86175775).

400461665 is a wasteful number, since it uses less digits than its factorization.

400461665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013911.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 400461665 is about 20011.5382966927. The cubic root of 400461665 is about 737.0896554768.

The spelling of 400461665 in words is "four hundred million, four hundred sixty-one thousand, six hundred sixty-five".