400495 has 8 divisors (see below), whose sum is σ = 484416. Its totient is φ = 317856.

The previous prime is 400481. The next prime is 400523. The reversal of 400495 is 594004.

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 400495 - 2⁹ = 399983 is a prime.

It is a Duffinian number.

400495 is a modest number, since divided by 495 gives 40 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (60552).

2⁴⁰⁰⁴⁹⁵ is an apocalyptic number.

400495 is a deficient number, since it is larger than the sum of its proper divisors (83921).

400495 is a wasteful number, since it uses less digits than its factorization.

400495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 400495 is about 632.8467429007. The cubic root of 400495 is about 73.7110107041.

Adding to 400495 its reverse (594004), we get a palindrome (994499).

The spelling of 400495 in words is "four hundred thousand, four hundred ninety-five".