981961328 has 20 divisors (see below), whose sum is σ = 1917077448. Its totient is φ = 487231680.

The previous prime is 981961303. The next prime is 981961349. The reversal of 981961328 is 823169189.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232151 + ... + 236342.

Almost surely, 2^981961328 is an apocalyptic number.

It is an amenable number.

981961328 is a deficient number, since it is larger than the sum of its proper divisors (935116120).

981961328 is a wasteful number, since it uses less digits than its factorization.

981961328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468632 (or 468626 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 981961328 is about 31336.2621893550. The cubic root of 981961328 is about 993.9505877382.

It can be divided in two parts, 981961 and 328, that added together give a palindrome (982289).

The spelling of 981961328 in words is "nine hundred eighty-one million, nine hundred sixty-one thousand, three hundred twenty-eight".