400030081 has 8 divisors (see below), whose sum is σ = 437409504. Its totient is φ = 362819520.

The previous prime is 400030073. The next prime is 400030087. The reversal of 400030081 is 180030004.

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

It is a cyclic number.

It is not a de Polignac number, because 400030081 - 2³ = 400030073 is a prime.

It is a super-2 number, since 2×400030081² = 320048131409733122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400030087) 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, 37231 + ... + 46756.

It is an arithmetic number, because the mean of its divisors is an integer number (54676188).

Almost surely, 2^400030081 is an apocalyptic number.

It is an amenable number.

400030081 is a deficient number, since it is larger than the sum of its proper divisors (37379423).

400030081 is a wasteful number, since it uses less digits than its factorization.

400030081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84431.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 400030081 is about 20000.7520108620. The cubic root of 400030081 is about 736.8247691570.

Adding to 400030081 its reverse (180030004), we get a palindrome (580060085).

The spelling of 400030081 in words is "four hundred million, thirty thousand, eighty-one".