400040030 has 64 divisors (see below), whose sum is σ = 798190848. Its totient is φ = 143431680.

The previous prime is 400040023. The next prime is 400040059. The reversal of 400040030 is 30040004.

It is a junction number, because it is equal to n+sod(n) for n = 400039993 and 400040020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1423490 + ... + 1423770.

It is an arithmetic number, because the mean of its divisors is an integer number (12471732).

Almost surely, 2^400040030 is an apocalyptic number.

400040030 is a deficient number, since it is larger than the sum of its proper divisors (398150818).

400040030 is a wasteful number, since it uses less digits than its factorization.

400040030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 400040030 is about 20001.0007249637. Note that the first 3 decimals coincide. The cubic root of 400040030 is about 736.8308775384.

Adding to 400040030 its reverse (30040004), we get a palindrome (430080034).

The spelling of 400040030 in words is "four hundred million, forty thousand, thirty".