400630 has 8 divisors (see below), whose sum is σ = 721152. Its totient is φ = 160248.

The previous prime is 400619. The next prime is 400643. The reversal of 400630 is 36004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400630.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20022 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (90144).

2⁴⁰⁰⁶³⁰ is an apocalyptic number.

400630 is a deficient number, since it is larger than the sum of its proper divisors (320522).

400630 is a wasteful number, since it uses less digits than its factorization.

400630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40070.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400630 is about 632.9533948088. The cubic root of 400630 is about 73.7192920131.

Adding to 400630 its reverse (36004), we get a palindrome (436634).

The spelling of 400630 in words is "four hundred thousand, six hundred thirty".