212207428 has 24 divisors (see below), whose sum is σ = 395629920. Its totient is φ = 99305280.

The previous prime is 212207419. The next prime is 212207441. The reversal of 212207428 is 824702212.

It is a junction number, because it is equal to n+sod(n) for n = 212207396 and 212207405.

It is an unprimeable number.

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, 10513 + ... + 23128.

It is an arithmetic number, because the mean of its divisors is an integer number (16484580).

Almost surely, 2^212207428 is an apocalyptic number.

It is an amenable number.

212207428 is a deficient number, since it is larger than the sum of its proper divisors (183422492).

212207428 is a wasteful number, since it uses less digits than its factorization.

212207428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33747 (or 33745 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 212207428 is about 14567.3411438052. The cubic root of 212207428 is about 596.4676036982.

The spelling of 212207428 in words is "two hundred twelve million, two hundred seven thousand, four hundred twenty-eight".