978512478 has 16 divisors (see below), whose sum is σ = 2004757776. Its totient is φ = 318215360.

The previous prime is 978512477. The next prime is 978512501. The reversal of 978512478 is 874215879.

It is a self number, because there is not a number n which added to its sum of digits gives 978512478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978512473) 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 7 ways as a sum of consecutive naturals, for example, 1988601 + ... + 1989092.

It is an arithmetic number, because the mean of its divisors is an integer number (125297361).

Almost surely, 2^978512478 is an apocalyptic number.

978512478 is an abundant number, since it is smaller than the sum of its proper divisors (1026245298).

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

978512478 is a wasteful number, since it uses less digits than its factorization.

978512478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977739.

The product of its digits is 1128960, while the sum is 51.

The square root of 978512478 is about 31281.1840888416. The cubic root of 978512478 is about 992.7855698295.

The spelling of 978512478 in words is "nine hundred seventy-eight million, five hundred twelve thousand, four hundred seventy-eight".