400906 has 8 divisors (see below), whose sum is σ = 656064. Its totient is φ = 182220.

The previous prime is 400903. The next prime is 400927. The reversal of 400906 is 609004.

It is a happy number.

400906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (400903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9090 + ... + 9133.

It is an arithmetic number, because the mean of its divisors is an integer number (82008).

2⁴⁰⁰⁹⁰⁶ is an apocalyptic number.

400906 is a deficient number, since it is larger than the sum of its proper divisors (255158).

400906 is a wasteful number, since it uses less digits than its factorization.

400906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18236.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 400906 is about 633.1713828025. The cubic root of 400906 is about 73.7362169014.

The spelling of 400906 in words is "four hundred thousand, nine hundred six".