981705132 has 18 divisors (see below), whose sum is σ = 2481532508. Its totient is φ = 327235032.

The previous prime is 981705119. The next prime is 981705133. The reversal of 981705132 is 231507189.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 27269587 = 981705132 / (9 + 8 + 1 + 7 + 0 + 5 + 1 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (981705133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13634758 + ... + 13634829.

Almost surely, 2^981705132 is an apocalyptic number.

It is an amenable number.

981705132 is an abundant number, since it is smaller than the sum of its proper divisors (1499827376).

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

981705132 is a wasteful number, since it uses less digits than its factorization.

981705132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27269597 (or 27269592 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 981705132 is about 31332.1740707535. The cubic root of 981705132 is about 993.8641388775.

The spelling of 981705132 in words is "nine hundred eighty-one million, seven hundred five thousand, one hundred thirty-two".