212840378 has 8 divisors (see below), whose sum is σ = 323302080. Its totient is φ = 105073020.

The previous prime is 212840363. The next prime is 212840399. The reversal of 212840378 is 873048212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 673388 + ... + 673703.

It is an arithmetic number, because the mean of its divisors is an integer number (40412760).

Almost surely, 2^212840378 is an apocalyptic number.

212840378 is a deficient number, since it is larger than the sum of its proper divisors (110461702).

212840378 is a wasteful number, since it uses less digits than its factorization.

212840378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347172.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 212840378 is about 14589.0499347970. The cubic root of 212840378 is about 597.0600420146.

The spelling of 212840378 in words is "two hundred twelve million, eight hundred forty thousand, three hundred seventy-eight".