212280628 has 24 divisors (see below), whose sum is σ = 430545024. Its totient is φ = 89695200.

The previous prime is 212280619. The next prime is 212280659. The reversal of 212280628 is 826082212.

It is a self number, because there is not a number n which added to its sum of digits gives 212280628.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51403 + ... + 55378.

It is an arithmetic number, because the mean of its divisors is an integer number (17939376).

Almost surely, 2^212280628 is an apocalyptic number.

212280628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212280628 is an abundant number, since it is smaller than the sum of its proper divisors (218264396).

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

212280628 is a wasteful number, since it uses less digits than its factorization.

212280628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106863 (or 106861 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 212280628 is about 14569.8533966543. The cubic root of 212280628 is about 596.5361787550.

The spelling of 212280628 in words is "two hundred twelve million, two hundred eighty thousand, six hundred twenty-eight".