212278885788 has 24 divisors (see below), whose sum is σ = 504663013008. Its totient is φ = 69424541056.

The previous prime is 212278885787. The next prime is 212278885807. The reversal of 212278885788 is 887588872212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212278885787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166885281 + ... + 166886552.

It is an arithmetic number, because the mean of its divisors is an integer number (21027625542).

Almost surely, 2^212278885788 is an apocalyptic number.

It is an amenable number.

212278885788 is an abundant number, since it is smaller than the sum of its proper divisors (292384127220).

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

212278885788 is a wasteful number, since it uses less digits than its factorization.

212278885788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333771893 (or 333771891 counting only the distinct ones).

The product of its digits is 64225280, while the sum is 66.

The spelling of 212278885788 in words is "two hundred twelve billion, two hundred seventy-eight million, eight hundred eighty-five thousand, seven hundred eighty-eight".