978791212 has 12 divisors (see below), whose sum is σ = 1957582480. Its totient is φ = 419481936.

The previous prime is 978791173. The next prime is 978791239. The reversal of 978791212 is 212197879.

978791212 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17478387 + ... + 17478442.

Almost surely, 2^978791212 is an apocalyptic number.

It is an amenable number.

978791212 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.

978791212 is a wasteful number, since it uses less digits than its factorization.

978791212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34956840 (or 34956838 counting only the distinct ones).

The product of its digits is 127008, while the sum is 46.

The square root of 978791212 is about 31285.6390697074. The cubic root of 978791212 is about 992.8798274665.

The spelling of 978791212 in words is "nine hundred seventy-eight million, seven hundred ninety-one thousand, two hundred twelve".