978779632 has 10 divisors (see below), whose sum is σ = 1896385568. Its totient is φ = 489389808.

The previous prime is 978779597. The next prime is 978779639. The reversal of 978779632 is 236977879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978779639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586848 + ... + 30586879.

Almost surely, 2^978779632 is an apocalyptic number.

It is an amenable number.

978779632 is a deficient number, since it is larger than the sum of its proper divisors (917605936).

978779632 is a wasteful number, since it uses less digits than its factorization.

978779632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61173735 (or 61173729 counting only the distinct ones).

The product of its digits is 8001504, while the sum is 58.

The square root of 978779632 is about 31285.4540002219. The cubic root of 978779632 is about 992.8759118907.

The spelling of 978779632 in words is "nine hundred seventy-eight million, seven hundred seventy-nine thousand, six hundred thirty-two".