402431224 has 32 divisors (see below), whose sum is σ = 813445920. Its totient is φ = 185544576.

The previous prime is 402431221. The next prime is 402431233. The reversal of 402431224 is 422134204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402431195 and 402431204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402431221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 164877 + ... + 167299.

It is an arithmetic number, because the mean of its divisors is an integer number (25420185).

Almost surely, 2^402431224 is an apocalyptic number.

It is an amenable number.

402431224 is an abundant number, since it is smaller than the sum of its proper divisors (411014696).

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

402431224 is a wasteful number, since it uses less digits than its factorization.

402431224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 4035 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 402431224 is about 20060.6885225807. The cubic root of 402431224 is about 738.2960697879.

Adding to 402431224 its reverse (422134204), we get a palindrome (824565428).

The spelling of 402431224 in words is "four hundred two million, four hundred thirty-one thousand, two hundred twenty-four".