981481584 has 20 divisors (see below), whose sum is σ = 2535494216. Its totient is φ = 327160512.

The previous prime is 981481561. The next prime is 981481601. The reversal of 981481584 is 485184189.

It is a super-2 number, since 2×981481584² = 1926612199462298112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 20447533 = 981481584 / (9 + 8 + 1 + 4 + 8 + 1 + 5 + 8 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10223719 + ... + 10223814.

Almost surely, 2^981481584 is an apocalyptic number.

It is an amenable number.

981481584 is an abundant number, since it is smaller than the sum of its proper divisors (1554012632).

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

981481584 is a wasteful number, since it uses less digits than its factorization.

981481584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20447544 (or 20447538 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The square root of 981481584 is about 31328.6064803400. The cubic root of 981481584 is about 993.7886942253.

The spelling of 981481584 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred eighty-four".