978265386 has 24 divisors (see below), whose sum is σ = 2422371744. Its totient is φ = 279504360.

The previous prime is 978265339. The next prime is 978265403. The reversal of 978265386 is 683562879.

It is a happy number.

978265386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3881880 + ... + 3882131.

It is an arithmetic number, because the mean of its divisors is an integer number (100932156).

Almost surely, 2^978265386 is an apocalyptic number.

978265386 is an abundant number, since it is smaller than the sum of its proper divisors (1444106358).

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

978265386 is a wasteful number, since it uses less digits than its factorization.

978265386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764026 (or 7764023 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 978265386 is about 31277.2343086789. The cubic root of 978265386 is about 992.7019973905.

The spelling of 978265386 in words is "nine hundred seventy-eight million, two hundred sixty-five thousand, three hundred eighty-six".