400450023 has 24 divisors (see below), whose sum is σ = 610766000. Its totient is φ = 252129024.

The previous prime is 400450021. The next prime is 400450111. The reversal of 400450023 is 320054004.

It is a happy number.

It is not a de Polignac number, because 400450023 - 2¹ = 400450021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400449978 and 400450005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400450021) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 54153 + ... + 61101.

Almost surely, 2^400450023 is an apocalyptic number.

400450023 is a deficient number, since it is larger than the sum of its proper divisors (210315977).

400450023 is a wasteful number, since it uses less digits than its factorization.

400450023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7308 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 400450023 is about 20011.2474123929. The cubic root of 400450023 is about 737.0825126533.

The spelling of 400450023 in words is "four hundred million, four hundred fifty thousand, twenty-three".