400531452 has 24 divisors (see below), whose sum is σ = 941711232. Its totient is φ = 132490800.

The previous prime is 400531447. The next prime is 400531463. The reversal of 400531452 is 254135004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125824 + ... + 128967.

It is an arithmetic number, because the mean of its divisors is an integer number (39237968).

Almost surely, 2^400531452 is an apocalyptic number.

It is an amenable number.

400531452 is an abundant number, since it is smaller than the sum of its proper divisors (541179780).

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

400531452 is a wasteful number, since it uses less digits than its factorization.

400531452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254929 (or 254927 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 400531452 is about 20013.2818897851. The cubic root of 400531452 is about 737.1324696357.

Adding to 400531452 its reverse (254135004), we get a palindrome (654666456).

The spelling of 400531452 in words is "four hundred million, five hundred thirty-one thousand, four hundred fifty-two".