407906 has 4 divisors (see below), whose sum is σ = 611862. Its totient is φ = 203952.

The previous prime is 407899. The next prime is 407917. The reversal of 407906 is 609704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 255025 + 152881 = 505^2 + 391^2 .

It is an unprimeable number.

407906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101975 + ... + 101978.

2⁴⁰⁷⁹⁰⁶ is an apocalyptic number.

407906 is a deficient number, since it is larger than the sum of its proper divisors (203956).

407906 is a wasteful number, since it uses less digits than its factorization.

407906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203955.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 407906 is about 638.6751913140. The cubic root of 407906 is about 74.1628989936.

The spelling of 407906 in words is "four hundred seven thousand, nine hundred six".