400446031 has 4 divisors (see below), whose sum is σ = 417856752. Its totient is φ = 383035312.

The previous prime is 400446017. The next prime is 400446049. The reversal of 400446031 is 130644004.

It is a happy number.

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 400446031 - 2¹¹ = 400443983 is a prime.

It is a super-2 number, since 2×400446031² = 320714047487305922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400445993 and 400446011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400446001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8705326 + ... + 8705371.

It is an arithmetic number, because the mean of its divisors is an integer number (104464188).

Almost surely, 2^400446031 is an apocalyptic number.

400446031 is a deficient number, since it is larger than the sum of its proper divisors (17410721).

400446031 is a wasteful number, since it uses less digits than its factorization.

400446031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17410720.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 400446031 is about 20011.1476682373. The cubic root of 400446031 is about 737.0800633729.

The spelling of 400446031 in words is "four hundred million, four hundred forty-six thousand, thirty-one".