981894132 has 18 divisors (see below), whose sum is σ = 2482010258. Its totient is φ = 327298032.

The previous prime is 981894131. The next prime is 981894139. The reversal of 981894132 is 231498189.

981894132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 505170576 + 476723556 = 22476^2 + 21834^2 .

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

It is a hoax number, since the sum of its digits (45) 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 (981894131) 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, 13637383 + ... + 13637454.

Almost surely, 2^981894132 is an apocalyptic number.

It is an amenable number.

981894132 is an abundant number, since it is smaller than the sum of its proper divisors (1500116126).

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

981894132 is a wasteful number, since it uses less digits than its factorization.

981894132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27274847 (or 27274842 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 981894132 is about 31335.1899946370. The cubic root of 981894132 is about 993.9279150777.

The spelling of 981894132 in words is "nine hundred eighty-one million, eight hundred ninety-four thousand, one hundred thirty-two".