400005530 has 16 divisors (see below), whose sum is σ = 720347040. Its totient is φ = 159927312.

The previous prime is 400005523. The next prime is 400005559. The reversal of 400005530 is 35500004.

It is a junction number, because it is equal to n+sod(n) for n = 400005499 and 400005508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16457 + ... + 32723.

It is an arithmetic number, because the mean of its divisors is an integer number (45021690).

Almost surely, 2^400005530 is an apocalyptic number.

400005530 is a deficient number, since it is larger than the sum of its proper divisors (320341510).

400005530 is a wasteful number, since it uses less digits than its factorization.

400005530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18733.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 400005530 is about 20000.1382495222. The cubic root of 400005530 is about 736.8096951615.

Adding to 400005530 its reverse (35500004), we get a palindrome (435505534).

The spelling of 400005530 in words is "four hundred million, five thousand, five hundred thirty".