405620007220 has 12 divisors (see below), whose sum is σ = 851802015204. Its totient is φ = 162248002880.

The previous prime is 405620007211. The next prime is 405620007241. The reversal of 405620007220 is 22700026504.

It can be written as a sum of positive squares in 2 ways, for example, as 164222699536 + 241397307684 = 405244^2 + 491322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10140500161 + ... + 10140500200.

It is an arithmetic number, because the mean of its divisors is an integer number (70983501267).

Almost surely, 2^405620007220 is an apocalyptic number.

It is an amenable number.

405620007220 is an abundant number, since it is smaller than the sum of its proper divisors (446182007984).

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

405620007220 is a wasteful number, since it uses less digits than its factorization.

405620007220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20281000370 (or 20281000368 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 405620007220 in words is "four hundred five billion, six hundred twenty million, seven thousand, two hundred twenty".