212039240 has 64 divisors (see below), whose sum is σ = 573955200. Its totient is φ = 68871168.

The previous prime is 212039237. The next prime is 212039263. The reversal of 212039240 is 42930212.

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 15 ways as a sum of consecutive naturals, for example, 14609 + ... + 25248.

It is an arithmetic number, because the mean of its divisors is an integer number (8968050).

Almost surely, 2^212039240 is an apocalyptic number.

212039240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212039240 is an abundant number, since it is smaller than the sum of its proper divisors (361915960).

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

212039240 is a wasteful number, since it uses less digits than its factorization.

212039240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39894 (or 39890 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 212039240 is about 14561.5672233452. The cubic root of 212039240 is about 596.3099824359.

Adding to 212039240 its reverse (42930212), we get a palindrome (254969452).

The spelling of 212039240 in words is "two hundred twelve million, thirty-nine thousand, two hundred forty".