400426 has 8 divisors (see below), whose sum is σ = 646884. Its totient is φ = 184800.

The previous prime is 400417. The next prime is 400429. The reversal of 400426 is 624004.

400426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 9801 = 625^2 + 99^2 .

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

It is not an unprimeable number, because it can be changed into a prime (400429) 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, 7675 + ... + 7726.

2⁴⁰⁰⁴²⁶ is an apocalyptic number.

400426 is a deficient number, since it is larger than the sum of its proper divisors (246458).

400426 is a wasteful number, since it uses less digits than its factorization.

400426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400426 is about 632.7922249838. The cubic root of 400426 is about 73.7067773163.

The spelling of 400426 in words is "four hundred thousand, four hundred twenty-six".