400706 has 16 divisors (see below), whose sum is σ = 649728. Its totient is φ = 184800.

The previous prime is 400703. The next prime is 400711. The reversal of 400706 is 607004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (40608).

2⁴⁰⁰⁷⁰⁶ is an apocalyptic number.

400706 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

400706 is a deficient number, since it is larger than the sum of its proper divisors (249022).

400706 is a wasteful number, since it uses less digits than its factorization.

400706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 400706 is about 633.0134279776. The cubic root of 400706 is about 73.7239532649.

Subtracting from 400706 its sum of digits (17), we obtain a square (400689 = 633²).

The spelling of 400706 in words is "four hundred thousand, seven hundred six".