402130128 has 80 divisors (see below), whose sum is σ = 1057472000. Its totient is φ = 131663232.

The previous prime is 402130093. The next prime is 402130139. The reversal of 402130128 is 821031204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805623 + ... + 806121.

It is an arithmetic number, because the mean of its divisors is an integer number (13218400).

Almost surely, 2^402130128 is an apocalyptic number.

402130128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402130128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528736000).

402130128 is an abundant number, since it is smaller than the sum of its proper divisors (655341872).

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

402130128 is a wasteful number, since it uses less digits than its factorization.

402130128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 402130128 is about 20053.1824905674. The cubic root of 402130128 is about 738.1118946678. Note that the first 3 decimals are identical.

The spelling of 402130128 in words is "four hundred two million, one hundred thirty thousand, one hundred twenty-eight".