981724880 has 20 divisors (see below), whose sum is σ = 2282510532. Its totient is φ = 392689920.

The previous prime is 981724867. The next prime is 981724897. The reversal of 981724880 is 88427189.

It can be written as a sum of positive squares in 2 ways, for example, as 420414016 + 561310864 = 20504^2 + 23692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×981724880² = 1927567480022028800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135701 + ... + 6135860.

Almost surely, 2^981724880 is an apocalyptic number.

It is an amenable number.

981724880 is an abundant number, since it is smaller than the sum of its proper divisors (1300785652).

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

981724880 is a wasteful number, since it uses less digits than its factorization.

981724880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271574 (or 12271568 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 981724880 is about 31332.4892084877. The cubic root of 981724880 is about 993.8708030298.

The spelling of 981724880 in words is "nine hundred eighty-one million, seven hundred twenty-four thousand, eight hundred eighty".