402420024 has 24 divisors (see below), whose sum is σ = 1089887760. Its totient is φ = 134139984.

The previous prime is 402420013. The next prime is 402420059. The reversal of 402420024 is 420024204.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402419979 and 402420006.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 2794512 + ... + 2794655.

It is an arithmetic number, because the mean of its divisors is an integer number (45411990).

Almost surely, 2^402420024 is an apocalyptic number.

It is an amenable number.

402420024 is an abundant number, since it is smaller than the sum of its proper divisors (687467736).

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

402420024 is a wasteful number, since it uses less digits than its factorization.

402420024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589179 (or 5589172 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 402420024 is about 20060.4093677073. The cubic root of 402420024 is about 738.2892205905.

Adding to 402420024 its reverse (420024204), we get a palindrome (822444228).

The spelling of 402420024 in words is "four hundred two million, four hundred twenty thousand, twenty-four".