400224342 has 16 divisors (see below), whose sum is σ = 914798592. Its totient is φ = 114349800.

The previous prime is 400224337. The next prime is 400224343. The reversal of 400224342 is 243422004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400224343) 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 7 ways as a sum of consecutive naturals, for example, 4764534 + ... + 4764617.

It is an arithmetic number, because the mean of its divisors is an integer number (57174912).

Almost surely, 2^400224342 is an apocalyptic number.

400224342 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400224342 is an abundant number, since it is smaller than the sum of its proper divisors (514574250).

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

400224342 is a wasteful number, since it uses less digits than its factorization.

400224342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529163.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 400224342 is about 20005.6077638246. The cubic root of 400224342 is about 736.9440211498.

Adding to 400224342 its reverse (243422004), we get a palindrome (643646346).

The spelling of 400224342 in words is "four hundred million, two hundred twenty-four thousand, three hundred forty-two".