400231012 has 24 divisors (see below), whose sum is σ = 718579512. Its totient is φ = 194937600.

The previous prime is 400231009. The next prime is 400231019. The reversal of 400231012 is 210132004.

It can be written as a sum of positive squares in 4 ways, for example, as 6843456 + 393387556 = 2616^2 + 19834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400230983 and 400231001.

It is not an unprimeable number, because it can be changed into a prime (400231019) 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, 138462 + ... + 141322.

It is an arithmetic number, because the mean of its divisors is an integer number (29940813).

Almost surely, 2^400231012 is an apocalyptic number.

It is an amenable number.

400231012 is a deficient number, since it is larger than the sum of its proper divisors (318348500).

400231012 is a wasteful number, since it uses less digits than its factorization.

400231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400231012 is about 20005.7744663884. The cubic root of 400231012 is about 736.9481150115.

Adding to 400231012 its reverse (210132004), we get a palindrome (610363016).

The spelling of 400231012 in words is "four hundred million, two hundred thirty-one thousand, twelve".