402420044 has 24 divisors (see below), whose sum is σ = 762022128. Its totient is φ = 184847040.

The previous prime is 402420013. The next prime is 402420059. The reversal of 402420044 is 440024204.

It is a junction number, because it is equal to n+sod(n) for n = 402419998 and 402420025.

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 7 ways as a sum of consecutive naturals, for example, 7367 + ... + 29310.

It is an arithmetic number, because the mean of its divisors is an integer number (31750922).

Almost surely, 2^402420044 is an apocalyptic number.

It is an amenable number.

402420044 is a deficient number, since it is larger than the sum of its proper divisors (359602084).

402420044 is a wasteful number, since it uses less digits than its factorization.

402420044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36905 (or 36903 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 402420044 is about 20060.4098662016. The cubic root of 402420044 is about 738.2892328213.

Adding to 402420044 its reverse (440024204), we get a palindrome (842444248).

The spelling of 402420044 in words is "four hundred two million, four hundred twenty thousand, forty-four".