400612 has 6 divisors (see below), whose sum is σ = 701078. Its totient is φ = 200304.

The previous prime is 400607. The next prime is 400619. The reversal of 400612 is 216004.

It can be written as a sum of positive squares in only one way, i.e., 389376 + 11236 = 624^2 + 106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400592 and 400601.

It is not an unprimeable number, because it can be changed into a prime (400619) by changing a digit.

400612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50073 + ... + 50080.

2⁴⁰⁰⁶¹² is an apocalyptic number.

It is an amenable number.

400612 is a deficient number, since it is larger than the sum of its proper divisors (300466).

400612 is a wasteful number, since it uses less digits than its factorization.

400612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100157 (or 100155 counting only the distinct ones).

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

The square root of 400612 is about 632.9391755927. The cubic root of 400612 is about 73.7181879460.

Adding to 400612 its reverse (216004), we get a palindrome (616616).

The spelling of 400612 in words is "four hundred thousand, six hundred twelve".