981481880 has 64 divisors (see below), whose sum is σ = 2275257600. Its totient is φ = 380822400.

The previous prime is 981481877. The next prime is 981481909. The reversal of 981481880 is 88184189.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257831 + ... + 261609.

It is an arithmetic number, because the mean of its divisors is an integer number (35550900).

Almost surely, 2^981481880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981481880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137628800).

981481880 is an abundant number, since it is smaller than the sum of its proper divisors (1293775720).

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

981481880 is a wasteful number, since it uses less digits than its factorization.

981481880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 981481880 is about 31328.6112044565. The cubic root of 981481880 is about 993.7887941292.

The spelling of 981481880 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, eight hundred eighty".