402312032420 has 24 divisors (see below), whose sum is σ = 858705357048. Its totient is φ = 158286700800.

The previous prime is 402312032417. The next prime is 402312032501. The reversal of 402312032420 is 24230213204.

It can be written as a sum of positive squares in 4 ways, for example, as 52162905664 + 350149126756 = 228392^2 + 591734^2 .

It is a super-2 number, since 2×402312032420² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164880761 + ... + 164883200.

It is an arithmetic number, because the mean of its divisors is an integer number (35779389877).

Almost surely, 2^402312032420 is an apocalyptic number.

It is an amenable number.

402312032420 is an abundant number, since it is smaller than the sum of its proper divisors (456393324628).

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

402312032420 is a wasteful number, since it uses less digits than its factorization.

402312032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329764031 (or 329764029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 402312032420 its reverse (24230213204), we get a palindrome (426542245624).

The spelling of 402312032420 in words is "four hundred two billion, three hundred twelve million, thirty-two thousand, four hundred twenty".