978717952 has 18 divisors (see below), whose sum is σ = 1953613298. Its totient is φ = 489358848.

The previous prime is 978717947. The next prime is 978717953. The reversal of 978717952 is 259717879.

It can be written as a sum of positive squares in only one way, i.e., 884705536 + 94012416 = 29744^2 + 9696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 978717893 and 978717902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978717953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1911303 + ... + 1911814.

Almost surely, 2^978717952 is an apocalyptic number.

It is an amenable number.

978717952 is a deficient number, since it is larger than the sum of its proper divisors (974895346).

978717952 is an equidigital number, since it uses as much as digits as its factorization.

978717952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823133 (or 3823119 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 55.

The square root of 978717952 is about 31284.4682230656. The cubic root of 978717952 is about 992.8550553496.

The spelling of 978717952 in words is "nine hundred seventy-eight million, seven hundred seventeen thousand, nine hundred fifty-two".