400205454 has 32 divisors (see below), whose sum is σ = 874177920. Its totient is φ = 121135200.

The previous prime is 400205441. The next prime is 400205459. The reversal of 400205454 is 454502004.

It is a super-2 number, since 2×400205454² = 320328810822692232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400205459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64417 + ... + 70355.

It is an arithmetic number, because the mean of its divisors is an integer number (27318060).

Almost surely, 2^400205454 is an apocalyptic number.

400205454 is an abundant number, since it is smaller than the sum of its proper divisors (473972466).

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

400205454 is a wasteful number, since it uses less digits than its factorization.

400205454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 400205454 is about 20005.1356906170. The cubic root of 400205454 is about 736.9324279705.

Adding to 400205454 its reverse (454502004), we get a palindrome (854707458).

The spelling of 400205454 in words is "four hundred million, two hundred five thousand, four hundred fifty-four".