400442101 has 8 divisors (see below), whose sum is σ = 410378144. Its totient is φ = 390534480.

The previous prime is 400442087. The next prime is 400442111. The reversal of 400442101 is 101244004.

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 400442101 - 2⁹ = 400441589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400442111) 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, 22975 + ... + 36451.

It is an arithmetic number, because the mean of its divisors is an integer number (51297268).

Almost surely, 2^400442101 is an apocalyptic number.

It is an amenable number.

400442101 is a deficient number, since it is larger than the sum of its proper divisors (9936043).

400442101 is a wasteful number, since it uses less digits than its factorization.

400442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14211.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400442101 is about 20011.0494727288. The cubic root of 400442101 is about 737.0776521166.

Adding to 400442101 its reverse (101244004), we get a palindrome (501686105).

The spelling of 400442101 in words is "four hundred million, four hundred forty-two thousand, one hundred one".