981820984 has 32 divisors (see below), whose sum is σ = 1914451200. Its totient is φ = 471479680.

The previous prime is 981820969. The next prime is 981820993. The reversal of 981820984 is 489028189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33234 + ... + 55390.

It is an arithmetic number, because the mean of its divisors is an integer number (59826600).

Almost surely, 2^981820984 is an apocalyptic number.

It is an amenable number.

981820984 is a deficient number, since it is larger than the sum of its proper divisors (932630216).

981820984 is a wasteful number, since it uses less digits than its factorization.

981820984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22383 (or 22379 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 981820984 is about 31334.0227867409. The cubic root of 981820984 is about 993.9032329719.

The spelling of 981820984 in words is "nine hundred eighty-one million, eight hundred twenty thousand, nine hundred eighty-four".