212796978 has 8 divisors (see below), whose sum is σ = 425593968. Its totient is φ = 70932324.

The previous prime is 212796959. The next prime is 212797003. The reversal of 212796978 is 879697212.

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

212796978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 212796978.

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 3 ways as a sum of consecutive naturals, for example, 17733076 + ... + 17733087.

It is an arithmetic number, because the mean of its divisors is an integer number (53199246).

Almost surely, 2^212796978 is an apocalyptic number.

212796978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212796978 is a wasteful number, since it uses less digits than its factorization.

212796978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35466168.

The product of its digits is 762048, while the sum is 51.

The square root of 212796978 is about 14587.5624420257. The cubic root of 212796978 is about 597.0194573481.

The spelling of 212796978 in words is "two hundred twelve million, seven hundred ninety-six thousand, nine hundred seventy-eight".