986984640 has 336 divisors, whose sum is σ = 3787261920. Its totient is φ = 234455040.

The previous prime is 986984639. The next prime is 986984689. The reversal of 986984640 is 46489689.

986984640 is a `hidden beast` number, since 98 + 6 + 98 + 464 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 929710 + ... + 930770.

Almost surely, 2^986984640 is an apocalyptic number.

986984640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 986984640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893630960).

986984640 is an abundant number, since it is smaller than the sum of its proper divisors (2800277280).

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

986984640 is a wasteful number, since it uses less digits than its factorization.

986984640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 986984640 is about 31416.3116867655. The cubic root of 986984640 is about 995.6425871985.

The spelling of 986984640 in words is "nine hundred eighty-six million, nine hundred eighty-four thousand, six hundred forty".