402003432 has 64 divisors (see below), whose sum is σ = 1127793600. Its totient is φ = 132667200.

The previous prime is 402003389. The next prime is 402003449. The reversal of 402003432 is 234300204.

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

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 15 ways as a sum of consecutive naturals, for example, 12603 + ... + 31029.

It is an arithmetic number, because the mean of its divisors is an integer number (17621775).

Almost surely, 2^402003432 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 402003432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563896800).

402003432 is an abundant number, since it is smaller than the sum of its proper divisors (725790168).

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

402003432 is a wasteful number, since it uses less digits than its factorization.

402003432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18543 (or 18533 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 402003432 is about 20050.0232418818. The cubic root of 402003432 is about 738.0343694748.

Adding to 402003432 its reverse (234300204), we get a palindrome (636303636).

The spelling of 402003432 in words is "four hundred two million, three thousand, four hundred thirty-two".