978489776 has 40 divisors (see below), whose sum is σ = 2102099088. Its totient is φ = 437472000.

The previous prime is 978489773. The next prime is 978489793. The reversal of 978489776 is 677984879.

It is a super-3 number, since 3×978489776³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (978489773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34835 + ... + 56306.

Almost surely, 2^978489776 is an apocalyptic number.

It is an amenable number.

978489776 is an abundant number, since it is smaller than the sum of its proper divisors (1123609312).

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

978489776 is a wasteful number, since it uses less digits than its factorization.

978489776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91221 (or 91215 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 65.

The square root of 978489776 is about 31280.8212168415. The cubic root of 978489776 is about 992.7778920558. Note that the first 3 decimals are identical.

The spelling of 978489776 in words is "nine hundred seventy-eight million, four hundred eighty-nine thousand, seven hundred seventy-six".