4981986 has 64 divisors (see below), whose sum is σ = 12044160. Its totient is φ = 1539648.

The previous prime is 4981981. The next prime is 4981993. The reversal of 4981986 is 6891894.

4981986 = 239² + 240² + ... + 305².

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4981981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74325 + ... + 74391.

It is an arithmetic number, because the mean of its divisors is an integer number (188190).

Almost surely, 2^4981986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4981986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6022080).

4981986 is an abundant number, since it is smaller than the sum of its proper divisors (7062174).

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

4981986 is an equidigital number, since it uses as much as digits as its factorization.

4981986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 89 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 4981986 is about 2232.0362900276. The cubic root of 4981986 is about 170.7919908418.

The spelling of 4981986 in words is "four million, nine hundred eighty-one thousand, nine hundred eighty-six".