402030020 has 24 divisors (see below), whose sum is σ = 964872384. Its totient is φ = 137838816.

The previous prime is 402030007. The next prime is 402030023. The reversal of 402030020 is 20030204.

It is a junction number, because it is equal to n+sod(n) for n = 402029983 and 402030010.

It is not an unprimeable number, because it can be changed into a prime (402030023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435682 + ... + 1435961.

It is an arithmetic number, because the mean of its divisors is an integer number (40203016).

Almost surely, 2^402030020 is an apocalyptic number.

It is an amenable number.

402030020 is an abundant number, since it is smaller than the sum of its proper divisors (562842364).

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

402030020 is a wasteful number, since it uses less digits than its factorization.

402030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871659 (or 2871657 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 402030020 is about 20050.6862725444. The cubic root of 402030020 is about 738.0506400035.

Adding to 402030020 its reverse (20030204), we get a palindrome (422060224).

The spelling of 402030020 in words is "four hundred two million, thirty thousand, twenty".