402520234120 has 128 divisors (see below), whose sum is σ = 961606080000. Its totient is φ = 151216837632.

The previous prime is 402520234097. The next prime is 402520234121. The reversal of 402520234120 is 21432025204.

It is a super-2 number, since 2×402520234120² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402520234121) 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 31 ways as a sum of consecutive naturals, for example, 41590722 + ... + 41600398.

It is an arithmetic number, because the mean of its divisors is an integer number (7512547500).

Almost surely, 2^402520234120 is an apocalyptic number.

402520234120 is a gapful number since it is divisible by the number (40) 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 402520234120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480803040000).

402520234120 is an abundant number, since it is smaller than the sum of its proper divisors (559085845880).

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

402520234120 is a wasteful number, since it uses less digits than its factorization.

402520234120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175 (or 10171 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 402520234120 its reverse (21432025204), we get a palindrome (423952259324).

The spelling of 402520234120 in words is "four hundred two billion, five hundred twenty million, two hundred thirty-four thousand, one hundred twenty".