978799500 has 432 divisors, whose sum is σ = 3767504832. Its totient is φ = 212889600.

The previous prime is 978799489. The next prime is 978799537. The reversal of 978799500 is 5997879.

It is a super-2 number, since 2×978799500² = 1916096922400500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5071404 + ... + 5071596.

It is an arithmetic number, because the mean of its divisors is an integer number (8721076).

Almost surely, 2^978799500 is an apocalyptic number.

978799500 is a gapful number since it is divisible by the number (90) 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 978799500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883752416).

978799500 is an abundant number, since it is smaller than the sum of its proper divisors (2788705332).

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

978799500 is a wasteful number, since it uses less digits than its factorization.

978799500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 54.

The square root of 978799500 is about 31285.7715263664. The cubic root of 978799500 is about 992.8826298908.

The spelling of 978799500 in words is "nine hundred seventy-eight million, seven hundred ninety-nine thousand, five hundred".