400353 has 4 divisors (see below), whose sum is σ = 533808. Its totient is φ = 266900.

The previous prime is 400339. The next prime is 400381. The reversal of 400353 is 353004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400353 - 2⁵ = 400321 is a prime.

It is a D-number.

It is a Curzon number.

400353 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (400313) 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, 66723 + ... + 66728.

It is an arithmetic number, because the mean of its divisors is an integer number (133452).

2⁴⁰⁰³⁵³ is an apocalyptic number.

It is an amenable number.

400353 is a deficient number, since it is larger than the sum of its proper divisors (133455).

400353 is a wasteful number, since it uses less digits than its factorization.

400353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133454.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 400353 is about 632.7345414943. The cubic root of 400353 is about 73.7022979854.

Adding to 400353 its reverse (353004), we get a palindrome (753357).

The spelling of 400353 in words is "four hundred thousand, three hundred fifty-three".