402543432 has 160 divisors (see below), whose sum is σ = 1205740800. Its totient is φ = 125193600.

The previous prime is 402543409. The next prime is 402543433. The reversal of 402543432 is 234345204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 402543396 and 402543405.

It is not an unprimeable number, because it can be changed into a prime (402543433) 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 39 ways as a sum of consecutive naturals, for example, 582207 + ... + 582897.

It is an arithmetic number, because the mean of its divisors is an integer number (7535880).

Almost surely, 2^402543432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402543432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602870400).

402543432 is an abundant number, since it is smaller than the sum of its proper divisors (803197368).

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

402543432 is a wasteful number, since it uses less digits than its factorization.

402543432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 402543432 is about 20063.4850412385. The cubic root of 402543432 is about 738.3646819483.

Adding to 402543432 its reverse (234345204), we get a palindrome (636888636).

The spelling of 402543432 in words is "four hundred two million, five hundred forty-three thousand, four hundred thirty-two".