400023895 has 8 divisors (see below), whose sum is σ = 485812656. Its totient is φ = 316163136.

The previous prime is 400023859. The next prime is 400023901. The reversal of 400023895 is 598320004.

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 400023895 - 2¹¹ = 400021847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481542 + ... + 482371.

It is an arithmetic number, because the mean of its divisors is an integer number (60726582).

Almost surely, 2^400023895 is an apocalyptic number.

400023895 is a deficient number, since it is larger than the sum of its proper divisors (85788761).

400023895 is an equidigital number, since it uses as much as digits as its factorization.

400023895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964001.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 400023895 is about 20000.5973660788. The cubic root of 400023895 is about 736.8209710914.

Adding to 400023895 its reverse (598320004), we get a palindrome (998343899).

The spelling of 400023895 in words is "four hundred million, twenty-three thousand, eight hundred ninety-five".