212708750440 has 32 divisors (see below), whose sum is σ = 483972165000. Its totient is φ = 84127504384.

The previous prime is 212708750431. The next prime is 212708750447. The reversal of 212708750440 is 44057807212.

212708750440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 109522607364 + 103186143076 = 330942^2 + 321226^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 212708750393 and 212708750402.

It is not an unprimeable number, because it can be changed into a prime (212708750447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29871265 + ... + 29878384.

Almost surely, 2^212708750440 is an apocalyptic number.

212708750440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212708750440 is an abundant number, since it is smaller than the sum of its proper divisors (271263414560).

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

212708750440 is a wasteful number, since it uses less digits than its factorization.

212708750440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59749749 (or 59749745 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 212708750440 in words is "two hundred twelve billion, seven hundred eight million, seven hundred fifty thousand, four hundred forty".