212042408 has 8 divisors (see below), whose sum is σ = 397579530. Its totient is φ = 106021200.

The previous prime is 212042407. The next prime is 212042419. The reversal of 212042408 is 804240212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 191047684 + 20994724 = 13822^2 + 4582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (212042407) 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 as a sum of consecutive naturals, namely, 13252643 + ... + 13252658.

Almost surely, 2^212042408 is an apocalyptic number.

It is an amenable number.

212042408 is a deficient number, since it is larger than the sum of its proper divisors (185537122).

212042408 is a wasteful number, since it uses less digits than its factorization.

212042408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26505307 (or 26505303 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 212042408 is about 14561.6760024387. The cubic root of 212042408 is about 596.3129521702.

The spelling of 212042408 in words is "two hundred twelve million, forty-two thousand, four hundred eight".