400000030 has 8 divisors (see below), whose sum is σ = 720000072. Its totient is φ = 160000008.

The previous prime is 400000009. The next prime is 400000043. The reversal of 400000030 is 30000004.

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

It is a junction number, because it is equal to n+sod(n) for n = 399999959 and 400000022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19999992 + ... + 20000011.

It is an arithmetic number, because the mean of its divisors is an integer number (90000009).

Almost surely, 2^400000030 is an apocalyptic number.

400000030 is a deficient number, since it is larger than the sum of its proper divisors (320000042).

400000030 is a wasteful number, since it uses less digits than its factorization.

400000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40000010.

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

The square root of 400000030 is about 20000.0007500000. Note that the first 3 decimals coincide. The cubic root of 400000030 is about 736.8063181482.

Adding to 400000030 its reverse (30000004), we get a palindrome (430000034).

The spelling of 400000030 in words is "four hundred million, thirty", and thus it is an aban number.