978776492 has 12 divisors (see below), whose sum is σ = 1752693096. Its totient is φ = 478007040.

The previous prime is 978776489. The next prime is 978776497. The reversal of 978776492 is 294677879.

It is not an unprimeable number, because it can be changed into a prime (978776497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845109 + ... + 2845452.

It is an arithmetic number, because the mean of its divisors is an integer number (146057758).

Almost surely, 2^978776492 is an apocalyptic number.

It is an amenable number.

978776492 is a deficient number, since it is larger than the sum of its proper divisors (773916604).

978776492 is a wasteful number, since it uses less digits than its factorization.

978776492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690608 (or 5690606 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 59.

The square root of 978776492 is about 31285.4038171157. The cubic root of 978776492 is about 992.8748501489.

The spelling of 978776492 in words is "nine hundred seventy-eight million, seven hundred seventy-six thousand, four hundred ninety-two".