400867 has 8 divisors (see below), whose sum is σ = 433440. Its totient is φ = 369600.

The previous prime is 400859. The next prime is 400871. The reversal of 400867 is 768004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400867 - 2³ = 400859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400837) 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 7 ways as a sum of consecutive naturals, for example, 367 + ... + 967.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2⁴⁰⁰⁸⁶⁷ is an apocalyptic number.

400867 is a deficient number, since it is larger than the sum of its proper divisors (32573).

400867 is a wasteful number, since it uses less digits than its factorization.

400867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400867 is about 633.1405847045. The cubic root of 400867 is about 73.7338258125.

The spelling of 400867 in words is "four hundred thousand, eight hundred sixty-seven".