400223420 has 12 divisors (see below), whose sum is σ = 840469224. Its totient is φ = 160089360.

The previous prime is 400223407. The next prime is 400223431. The reversal of 400223420 is 24322004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10005566 + ... + 10005605.

It is an arithmetic number, because the mean of its divisors is an integer number (70039102).

Almost surely, 2^400223420 is an apocalyptic number.

It is an amenable number.

400223420 is an abundant number, since it is smaller than the sum of its proper divisors (440245804).

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

400223420 is a wasteful number, since it uses less digits than its factorization.

400223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20011180 (or 20011178 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400223420 is about 20005.5847202725. The cubic root of 400223420 is about 736.9434552481.

Adding to 400223420 its reverse (24322004), we get a palindrome (424545424).

The spelling of 400223420 in words is "four hundred million, two hundred twenty-three thousand, four hundred twenty".