400030 has 16 divisors (see below), whose sum is σ = 728640. Its totient is φ = 158112.

The previous prime is 400009. The next prime is 400031. The reversal of 400030 is 30004.

It is a junction number, because it is equal to n+sod(n) for n = 399986 and 400022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031) 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, 907 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (45540).

2⁴⁰⁰⁰³⁰ is an apocalyptic number.

400030 is a deficient number, since it is larger than the sum of its proper divisors (328610).

400030 is a wasteful number, since it uses less digits than its factorization.

400030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483.

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 400030 is about 632.4792486714. The cubic root of 400030 is about 73.6824719425.

Adding to 400030 its reverse (30004), we get a palindrome (430034).

The spelling of 400030 in words is "four hundred thousand, thirty".