978422247 has 40 divisors (see below), whose sum is σ = 1601381760.
Its totient is φ = 592851960.
The previous prime is 978422209. The next prime is 978422257. The reversal of 978422247 is 742224879.
It is not a de Polignac number, because 978422247 - 26 = 978422183 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (978422257) by changing a digit.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 214254 + ... + 218772.
It is an arithmetic number, because the mean of its divisors is an integer number (40034544).
Almost surely, 2978422247 is an apocalyptic number.
978422247 is a deficient number, since it is larger than the sum of its proper divisors (622959513).
978422247 is an frugal number, since it uses more digits than its factorization.
With its successor (978422248) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (4533).
978422247 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4557 (or 4533 counting only the distinct ones).
The product of its digits is 451584, while the sum is 45.
The square root of 978422247 is about 31279.7417988065.
The cubic root of 978422247 is about 992.7550531728.
The spelling of 978422247 in words is "nine hundred seventy-eight million, four hundred twenty-two thousand, two hundred forty-seven".