400621353 has 16 divisors (see below), whose sum is σ = 583056576. Its totient is φ = 242661440.

The previous prime is 400621321. The next prime is 400621369. The reversal of 400621353 is 353126004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400621353 - 2⁵ = 400621321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400621313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110851 + ... + 114407.

It is an arithmetic number, because the mean of its divisors is an integer number (36441036).

Almost surely, 2^400621353 is an apocalyptic number.

It is an amenable number.

400621353 is a deficient number, since it is larger than the sum of its proper divisors (182435223).

400621353 is a wasteful number, since it uses less digits than its factorization.

400621353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 400621353 is about 20015.5277971879. The cubic root of 400621353 is about 737.1876163566.

Adding to 400621353 its reverse (353126004), we get a palindrome (753747357).

The spelling of 400621353 in words is "four hundred million, six hundred twenty-one thousand, three hundred fifty-three".