400354 has 4 divisors (see below), whose sum is σ = 600534. Its totient is φ = 200176.

The previous prime is 400339. The next prime is 400381. The reversal of 400354 is 453004.

400354 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 393129 + 7225 = 627^2 + 85^2 .

It is an unprimeable number.

400354 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, 100087 + ... + 100090.

2⁴⁰⁰³⁵⁴ is an apocalyptic number.

400354 is a deficient number, since it is larger than the sum of its proper divisors (200180).

400354 is a wasteful number, since it uses less digits than its factorization.

400354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200179.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 400354 is about 632.7353317146. The cubic root of 400354 is about 73.7023593497.

Adding to 400354 its reverse (453004), we get a palindrome (853358).

Subtracting 400354 from its reverse (453004), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 400354 in words is "four hundred thousand, three hundred fifty-four".