978650280 has 96 divisors (see below), whose sum is σ = 3198592800. Its totient is φ = 259498368.

The previous prime is 978650273. The next prime is 978650291. The reversal of 978650280 is 82056879.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56847 + ... + 72033.

It is an arithmetic number, because the mean of its divisors is an integer number (33318675).

Almost surely, 2^978650280 is an apocalyptic number.

978650280 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 978650280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599296400).

978650280 is an abundant number, since it is smaller than the sum of its proper divisors (2219942520).

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

978650280 is a wasteful number, since it uses less digits than its factorization.

978650280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15383 (or 15376 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 978650280 is about 31283.3866453106. The cubic root of 978650280 is about 992.8321716592.

The spelling of 978650280 in words is "nine hundred seventy-eight million, six hundred fifty thousand, two hundred eighty".