402646212 has 18 divisors (see below), whose sum is σ = 1017800238. Its totient is φ = 134215392.

The previous prime is 402646201. The next prime is 402646217. The reversal of 402646212 is 212646204.

402646212 is a `hidden beast` number, since 4 + 0 + 2 + 646 + 2 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 319908996 + 82737216 = 17886^2 + 9096^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (402646217) 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 5 ways as a sum of consecutive naturals, for example, 5592273 + ... + 5592344.

Almost surely, 2^402646212 is an apocalyptic number.

It is an amenable number.

402646212 is an abundant number, since it is smaller than the sum of its proper divisors (615154026).

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

402646212 is a wasteful number, since it uses less digits than its factorization.

402646212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11184627 (or 11184622 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 402646212 is about 20066.0462473303. The cubic root of 402646212 is about 738.4275179540.

The spelling of 402646212 in words is "four hundred two million, six hundred forty-six thousand, two hundred twelve".