400923 has 16 divisors (see below), whose sum is σ = 614400. Its totient is φ = 258120.

The previous prime is 400903. The next prime is 400927. The reversal of 400923 is 329004.

It is not a de Polignac number, because 400923 - 2⁶ = 400859 is a prime.

It is a super-3 number, since 3×400923³ = 193332189303391401, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400896 and 400905.

It is not an unprimeable number, because it can be changed into a prime (400927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598 + ... + 1076.

It is an arithmetic number, because the mean of its divisors is an integer number (38400).

2⁴⁰⁰⁹²³ is an apocalyptic number.

400923 is a deficient number, since it is larger than the sum of its proper divisors (213477).

400923 is a wasteful number, since it uses less digits than its factorization.

400923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 400923 is about 633.1848071456. The cubic root of 400923 is about 73.7372591224.

Adding to 400923 its reverse (329004), we get a palindrome (729927).

The spelling of 400923 in words is "four hundred thousand, nine hundred twenty-three".