978929448 has 192 divisors, whose sum is σ = 2964729600. Its totient is φ = 268369920.

The previous prime is 978929447. The next prime is 978929449. The reversal of 978929448 is 844929879.

It is an interprime number because it is at equal distance from previous prime (978929447) and next prime (978929449).

It is a junction number, because it is equal to n+sod(n) for n = 978929391 and 978929400.

It is not an unprimeable number, because it can be changed into a prime (978929447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3808936 + ... + 3809192.

It is an arithmetic number, because the mean of its divisors is an integer number (15441300).

Almost surely, 2^978929448 is an apocalyptic number.

978929448 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978929448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482364800).

978929448 is an abundant number, since it is smaller than the sum of its proper divisors (1985800152).

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

978929448 is a wasteful number, since it uses less digits than its factorization.

978929448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 389 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 978929448 is about 31287.8482481618. The cubic root of 978929448 is about 992.9265671843.

The spelling of 978929448 in words is "nine hundred seventy-eight million, nine hundred twenty-nine thousand, four hundred forty-eight".