405805242252 has 48 divisors (see below), whose sum is σ = 965299410432. Its totient is φ = 132639848640.

The previous prime is 405805242239. The next prime is 405805242257. The reversal of 405805242252 is 252242508504.

It is a self number, because there is not a number n which added to its sum of digits gives 405805242252.

It is not an unprimeable number, because it can be changed into a prime (405805242257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928477 + ... + 1293707.

It is an arithmetic number, because the mean of its divisors is an integer number (20110404384).

Almost surely, 2^405805242252 is an apocalyptic number.

It is an amenable number.

405805242252 is an abundant number, since it is smaller than the sum of its proper divisors (559494168180).

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

405805242252 is a wasteful number, since it uses less digits than its factorization.

405805242252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367038 (or 367036 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 39.

The spelling of 405805242252 in words is "four hundred five billion, eight hundred five million, two hundred forty-two thousand, two hundred fifty-two".