212402028 has 12 divisors (see below), whose sum is σ = 495604760. Its totient is φ = 70800672.

The previous prime is 212402027. The next prime is 212402093. The reversal of 212402028 is 820204212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×212402028² = 90229242997025568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212401995 and 212402013.

It is not an unprimeable number, because it can be changed into a prime (212402023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8850073 + ... + 8850096.

Almost surely, 2^212402028 is an apocalyptic number.

It is an amenable number.

212402028 is an abundant number, since it is smaller than the sum of its proper divisors (283202732).

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

212402028 is a wasteful number, since it uses less digits than its factorization.

212402028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17700176 (or 17700174 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 212402028 is about 14574.0189378222. The cubic root of 212402028 is about 596.6498736817.

The spelling of 212402028 in words is "two hundred twelve million, four hundred two thousand, twenty-eight".