402543020 has 48 divisors (see below), whose sum is σ = 935214336. Its totient is φ = 144312000.

The previous prime is 402543013. The next prime is 402543041. The reversal of 402543020 is 20345204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402542983 and 402543001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735 + ... + 28505.

It is an arithmetic number, because the mean of its divisors is an integer number (19483632).

Almost surely, 2^402543020 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 402543020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467607168).

402543020 is an abundant number, since it is smaller than the sum of its proper divisors (532671316).

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

402543020 is a wasteful number, since it uses less digits than its factorization.

402543020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25862 (or 25860 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 402543020 is about 20063.4747738272. The cubic root of 402543020 is about 738.3644300448.

Adding to 402543020 its reverse (20345204), we get a palindrome (422888224).

The spelling of 402543020 in words is "four hundred two million, five hundred forty-three thousand, twenty".