212880770 has 16 divisors (see below), whose sum is σ = 385759800. Its totient is φ = 84580224.

The previous prime is 212880763. The next prime is 212880779. The reversal of 212880770 is 77088212.

It can be written as a sum of positive squares in 4 ways, for example, as 169702729 + 43178041 = 13027^2 + 6571^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212880770.

It is not an unprimeable number, because it can be changed into a prime (212880779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69947 + ... + 72926.

Almost surely, 2^212880770 is an apocalyptic number.

212880770 is a deficient number, since it is larger than the sum of its proper divisors (172879030).

212880770 is a wasteful number, since it uses less digits than its factorization.

212880770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143029.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 212880770 is about 14590.4341950471. The cubic root of 212880770 is about 597.0978088519.

The spelling of 212880770 in words is "two hundred twelve million, eight hundred eighty thousand, seven hundred seventy".