400434 has 8 divisors (see below), whose sum is σ = 800880. Its totient is φ = 133476.

The previous prime is 400429. The next prime is 400441. The reversal of 400434 is 434004.

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

400434 is an admirable number.

It is an unprimeable number.

400434 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 in 3 ways as a sum of consecutive naturals, for example, 33364 + ... + 33375.

It is an arithmetic number, because the mean of its divisors is an integer number (100110).

2⁴⁰⁰⁴³⁴ is an apocalyptic number.

400434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400434 is a wasteful number, since it uses less digits than its factorization.

400434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66744.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400434 is about 632.7985461425. The cubic root of 400434 is about 73.7072681688.

Adding to 400434 its reverse (434004), we get a palindrome (834438).

The spelling of 400434 in words is "four hundred thousand, four hundred thirty-four".