400873 has 6 divisors (see below), whose sum is σ = 440762. Its totient is φ = 364320.

The previous prime is 400871. The next prime is 400903. The reversal of 400873 is 378004.

It can be written as a sum of positive squares in only one way, i.e., 393129 + 7744 = 627^2 + 88^2 .

It is not a de Polignac number, because 400873 - 2¹ = 400871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1536 + ... + 1777.

2⁴⁰⁰⁸⁷³ is an apocalyptic number.

It is an amenable number.

400873 is a deficient number, since it is larger than the sum of its proper divisors (39889).

400873 is a wasteful number, since it uses less digits than its factorization.

400873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 400873 is about 633.1453229710. The cubic root of 400873 is about 73.7341936824.

Adding to 400873 its reverse (378004), we get a palindrome (778877).

The spelling of 400873 in words is "four hundred thousand, eight hundred seventy-three".