981588 has 12 divisors (see below), whose sum is σ = 2290400. Its totient is φ = 327192.

The previous prime is 981587. The next prime is 981599. The reversal of 981588 is 885189.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40888 + ... + 40911.

2⁹⁸¹⁵⁸⁸ is an apocalyptic number.

It is an amenable number.

981588 is an abundant number, since it is smaller than the sum of its proper divisors (1308812).

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

981588 is a wasteful number, since it uses less digits than its factorization.

981588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81806 (or 81804 counting only the distinct ones).

The product of its digits is 23040, while the sum is 39.

The square root of 981588 is about 990.7512301279. The cubic root of 981588 is about 99.3824609722.

The spelling of 981588 in words is "nine hundred eighty-one thousand, five hundred eighty-eight".