981881748 has 36 divisors (see below), whose sum is σ = 2493761088. Its totient is φ = 325740240.

The previous prime is 981881729. The next prime is 981881749. The reversal of 981881748 is 847188189.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 981881694 and 981881703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981881749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57036 + ... + 72227.

Almost surely, 2^981881748 is an apocalyptic number.

It is an amenable number.

981881748 is an abundant number, since it is smaller than the sum of its proper divisors (1511879340).

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

981881748 is a wasteful number, since it uses less digits than its factorization.

981881748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129484 (or 129479 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 54.

The square root of 981881748 is about 31334.9923887018. The cubic root of 981881748 is about 993.9237364687.

The spelling of 981881748 in words is "nine hundred eighty-one million, eight hundred eighty-one thousand, seven hundred forty-eight".