400442635 has 4 divisors (see below), whose sum is σ = 480531168. Its totient is φ = 320354104.

The previous prime is 400442629. The next prime is 400442657. The reversal of 400442635 is 536244004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400442635 - 2²³ = 392054027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40044259 + ... + 40044268.

It is an arithmetic number, because the mean of its divisors is an integer number (120132792).

Almost surely, 2^400442635 is an apocalyptic number.

400442635 is a deficient number, since it is larger than the sum of its proper divisors (80088533).

400442635 is an equidigital number, since it uses as much as digits as its factorization.

400442635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80088532.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 400442635 is about 20011.0628153529. The cubic root of 400442635 is about 737.0779797539.

Adding to 400442635 its reverse (536244004), we get a palindrome (936686639).

The spelling of 400442635 in words is "four hundred million, four hundred forty-two thousand, six hundred thirty-five".