420236434186836 has 96 divisors (see below), whose sum is σ = 1028733558209280. Its totient is φ = 133332847872000.

The previous prime is 420236434186753. The next prime is 420236434186843. The reversal of 420236434186836 is 638681434632024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 420236434186836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308590636 + ... + 309949436.

It is an arithmetic number, because the mean of its divisors is an integer number (10715974564680).

Almost surely, 2^{420236434186836} 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 420236434186836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514366779104640).

420236434186836 is an abundant number, since it is smaller than the sum of its proper divisors (608497124022444).

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

420236434186836 is a wasteful number, since it uses less digits than its factorization.

420236434186836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371425 (or 1371423 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 60.

The spelling of 420236434186836 in words is "four hundred twenty trillion, two hundred thirty-six billion, four hundred thirty-four million, one hundred eighty-six thousand, eight hundred thirty-six".