981278580 has 48 divisors (see below), whose sum is σ = 2749610304. Its totient is φ = 261480960.

The previous prime is 981278561. The next prime is 981278611. The reversal of 981278580 is 85872189.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 87915 + ... + 98445.

It is an arithmetic number, because the mean of its divisors is an integer number (57283548).

Almost surely, 2^981278580 is an apocalyptic number.

It is an amenable number.

981278580 is an abundant number, since it is smaller than the sum of its proper divisors (1768331724).

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

981278580 is a wasteful number, since it uses less digits than its factorization.

981278580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12096 (or 12094 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The square root of 981278580 is about 31325.3663984956. The cubic root of 981278580 is about 993.7201729903.

The spelling of 981278580 in words is "nine hundred eighty-one million, two hundred seventy-eight thousand, five hundred eighty".