978486877420 has 72 divisors (see below), whose sum is σ = 2296820292480. Its totient is φ = 349632990720.

The previous prime is 978486877393. The next prime is 978486877499. The reversal of 978486877420 is 24778684879.

It is a self number, because there is not a number n which added to its sum of digits gives 978486877420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4564465 + ... + 4774024.

It is an arithmetic number, because the mean of its divisors is an integer number (31900281840).

Almost surely, 2^978486877420 is an apocalyptic number.

It is an amenable number.

978486877420 is an abundant number, since it is smaller than the sum of its proper divisors (1318333415060).

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

978486877420 is a wasteful number, since it uses less digits than its factorization.

978486877420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9338555 (or 9338540 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 70.

The spelling of 978486877420 in words is "nine hundred seventy-eight billion, four hundred eighty-six million, eight hundred seventy-seven thousand, four hundred twenty".