400673 has 24 divisors (see below), whose sum is σ = 545832. Its totient is φ = 290304.

The previous prime is 400657. The next prime is 400679. The reversal of 400673 is 376004.

It can be written as a sum of positive squares in 4 ways, for example, as 117649 + 283024 = 343^2 + 532^2 .

It is not a de Polignac number, because 400673 - 2⁴ = 400657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10811 + ... + 10847.

It is an arithmetic number, because the mean of its divisors is an integer number (22743).

2⁴⁰⁰⁶⁷³ is an apocalyptic number.

It is an amenable number.

400673 is a deficient number, since it is larger than the sum of its proper divisors (145159).

400673 is a wasteful number, since it uses less digits than its factorization.

400673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 400673 is about 632.9873616432. The cubic root of 400673 is about 73.7219293727.

Adding to 400673 its reverse (376004), we get a palindrome (776677).

The spelling of 400673 in words is "four hundred thousand, six hundred seventy-three".