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4981985 = 57731289
BaseRepresentation
bin10011000000010011100001
3100101002222222
4103000103201
52233410420
6254440425
760226511
oct23002341
910332888
104981985
1128a3048
121803115
131055828
14939841
15686225
hex4c04e1

4981985 has 8 divisors (see below), whose sum is σ = 5990760. Its totient is φ = 3977344.

The previous prime is 4981981. The next prime is 4981993. The reversal of 4981985 is 5891894.

Subtracting 4981985 from its reverse (5891894), we obtain a palindrome (909909).

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 4734976 = 497^2 + 2176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4981985 - 22 = 4981981 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 3221 + ... + 4509.

It is an arithmetic number, because the mean of its divisors is an integer number (748845).

Almost surely, 24981985 is an apocalyptic number.

4981985 is the 1289-th octagonal number.

It is an amenable number.

4981985 is a deficient number, since it is larger than the sum of its proper divisors (1008775).

4981985 is a wasteful number, since it uses less digits than its factorization.

4981985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067.

The product of its digits is 103680, while the sum is 44.

The square root of 4981985 is about 2232.0360660169. The cubic root of 4981985 is about 170.7919794145.

The spelling of 4981985 in words is "four million, nine hundred eighty-one thousand, nine hundred eighty-five".

Divisors: 1 5 773 1289 3865 6445 996397 4981985