981409144 has 32 divisors (see below), whose sum is σ = 1869458400. Its totient is φ = 482912640.

The previous prime is 981409123. The next prime is 981409157. The reversal of 981409144 is 441904189.

It is a junction number, because it is equal to n+sod(n) for n = 981409097 and 981409106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401494 + ... + 403930.

It is an arithmetic number, because the mean of its divisors is an integer number (58420575).

Almost surely, 2^981409144 is an apocalyptic number.

It is an amenable number.

981409144 is a deficient number, since it is larger than the sum of its proper divisors (888049256).

981409144 is a wasteful number, since it uses less digits than its factorization.

981409144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 981409144 is about 31327.4503271492. The cubic root of 981409144 is about 993.7642441743.

The spelling of 981409144 in words is "nine hundred eighty-one million, four hundred nine thousand, one hundred forty-four".