978491285 has 8 divisors (see below), whose sum is σ = 1212066816. Its totient is φ = 757541520.

The previous prime is 978491221. The next prime is 978491303. The reversal of 978491285 is 582194879.

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

It is not a de Polignac number, because 978491285 - 2⁶ = 978491221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156269 + ... + 3156578.

It is an arithmetic number, because the mean of its divisors is an integer number (151508352).

Almost surely, 2^978491285 is an apocalyptic number.

It is an amenable number.

978491285 is a deficient number, since it is larger than the sum of its proper divisors (233575531).

978491285 is a wasteful number, since it uses less digits than its factorization.

978491285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312883.

The product of its digits is 1451520, while the sum is 53.

The square root of 978491285 is about 31280.8453370429. The cubic root of 978491285 is about 992.7784024004.

The spelling of 978491285 in words is "nine hundred seventy-eight million, four hundred ninety-one thousand, two hundred eighty-five".