978446285 has 4 divisors (see below), whose sum is σ = 1174135548. Its totient is φ = 782757024.

The previous prime is 978446267. The next prime is 978446297. The reversal of 978446285 is 582644879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582644879 = 4261 ⋅136739.

It can be written as a sum of positive squares in 2 ways, for example, as 213481321 + 764964964 = 14611^2 + 27658^2 .

It is a cyclic number.

It is not a de Polignac number, because 978446285 - 2⁶ = 978446221 is a prime.

It is a Duffinian number.

It is a congruent 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, 97844624 + ... + 97844633.

It is an arithmetic number, because the mean of its divisors is an integer number (293533887).

Almost surely, 2^978446285 is an apocalyptic number.

It is an amenable number.

978446285 is a deficient number, since it is larger than the sum of its proper divisors (195689263).

978446285 is a wasteful number, since it uses less digits than its factorization.

978446285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195689262.

The product of its digits is 3870720, while the sum is 53.

The square root of 978446285 is about 31280.1260387486. The cubic root of 978446285 is about 992.7631831496.

The spelling of 978446285 in words is "nine hundred seventy-eight million, four hundred forty-six thousand, two hundred eighty-five".