400051023 has 32 divisors (see below), whose sum is σ = 576844800. Its totient is φ = 245846016.

The previous prime is 400051009. The next prime is 400051031. The reversal of 400051023 is 320150004.

It is not a de Polignac number, because 400051023 - 2⁴ = 400051007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400050993 and 400051011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400051423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328111 + ... + 329327.

It is an arithmetic number, because the mean of its divisors is an integer number (18026400).

Almost surely, 2^400051023 is an apocalyptic number.

400051023 is a deficient number, since it is larger than the sum of its proper divisors (176793777).

400051023 is a wasteful number, since it uses less digits than its factorization.

400051023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 400051023 is about 20001.2755343253. The cubic root of 400051023 is about 736.8376267860.

The spelling of 400051023 in words is "four hundred million, fifty-one thousand, twenty-three".