400213450 has 48 divisors (see below), whose sum is σ = 916191360. Its totient is φ = 126659520.

The previous prime is 400213403. The next prime is 400213481. The reversal of 400213450 is 54312004.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 39430 + ... + 48529.

It is an arithmetic number, because the mean of its divisors is an integer number (19087320).

Almost surely, 2^400213450 is an apocalyptic number.

400213450 is an abundant number, since it is smaller than the sum of its proper divisors (515977910).

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

400213450 is a wasteful number, since it uses less digits than its factorization.

400213450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87991 (or 87986 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400213450 is about 20005.3355383008. The cubic root of 400213450 is about 736.9373358434.

Adding to 400213450 its reverse (54312004), we get a palindrome (454525454).

The spelling of 400213450 in words is "four hundred million, two hundred thirteen thousand, four hundred fifty".