78212876 has 24 divisors (see below), whose sum is σ = 161473536. Its totient is φ = 32438160.

The previous prime is 78212867. The next prime is 78212887. The reversal of 78212876 is 67821287.

It is a super-2 number, since 2×78212876² = 12234507944382752, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 44186 + ... + 45921.

It is an arithmetic number, because the mean of its divisors is an integer number (6728064).

Almost surely, 2^78212876 is an apocalyptic number.

It is an amenable number.

78212876 is an abundant number, since it is smaller than the sum of its proper divisors (83260660).

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

78212876 is a wasteful number, since it uses less digits than its factorization.

78212876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90149 (or 90147 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 78212876 is about 8843.8043849918. The cubic root of 78212876 is about 427.6542101797.

The spelling of 78212876 in words is "seventy-eight million, two hundred twelve thousand, eight hundred seventy-six".