402420432 has 20 divisors (see below), whose sum is σ = 1039586240. Its totient is φ = 134140128.

The previous prime is 402420427. The next prime is 402420463. The reversal of 402420432 is 234024204.

It is a junction number, because it is equal to n+sod(n) for n = 402420399 and 402420408.

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 3 ways as a sum of consecutive naturals, for example, 4191832 + ... + 4191927.

It is an arithmetic number, because the mean of its divisors is an integer number (51979312).

Almost surely, 2^402420432 is an apocalyptic number.

It is an amenable number.

402420432 is an abundant number, since it is smaller than the sum of its proper divisors (637165808).

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

402420432 is a wasteful number, since it uses less digits than its factorization.

402420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8383770 (or 8383764 counting only the distinct ones).

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

The square root of 402420432 is about 20060.4195369888. The cubic root of 402420432 is about 738.2894700992.

Adding to 402420432 its reverse (234024204), we get a palindrome (636444636).

The spelling of 402420432 in words is "four hundred two million, four hundred twenty thousand, four hundred thirty-two".