400611012 has 12 divisors (see below), whose sum is σ = 934759056. Its totient is φ = 133537000.

The previous prime is 400611011. The next prime is 400611019. The reversal of 400611012 is 210116004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 400610982 and 400611000.

It is not an unprimeable number, because it can be changed into a prime (400611011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16692114 + ... + 16692137.

It is an arithmetic number, because the mean of its divisors is an integer number (77896588).

Almost surely, 2^400611012 is an apocalyptic number.

It is an amenable number.

400611012 is an abundant number, since it is smaller than the sum of its proper divisors (534148044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400611012 is a wasteful number, since it uses less digits than its factorization.

400611012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33384258 (or 33384256 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 400611012 is about 20015.2694710813. The cubic root of 400611012 is about 737.1812734406.

Adding to 400611012 its reverse (210116004), we get a palindrome (610727016).

The spelling of 400611012 in words is "four hundred million, six hundred eleven thousand, twelve".